SciFi Planet

Is it possible to have a planet with 10x surface area of earth and have a gravity that is comparable to Earth's (~1.0x)?

I want to create a scifi universe that is limited to a single planet. But the planet would have to be so large that globalization is not possible as a jet airliner flight around the world simply would not be feasible. I also want it so large that there would be so many cultures and so far away that it would force some form of localization thereby limiting true globalization. This would maintain the mystery of pre-global period in earth's history.

Let's gather some basic geometry
A=4*pi*r^2

r_earth=6,371km
A_earth=510.1million km^2

A_scifi_earth=10*A_earth=5101million km^2
r_scifi_earth=sqrt(A_scifi_earth/4*pi))=20,150km

The radius would be over three times larger than Earth's.

Newton's Law of Gravitation
F_gravity=G*m1*m2/r^2

m_earth=5.972x10^24kg
G=6.673x10^-11N*m^2/kg^2
m2=1

Plugging these values gives us the standard gravity on earth of 9.81m/s^2.

F_earth=9.81m/s^2

Using this value and the values above we can calculate the required mass of scifi_earth:

m_scifi_earth=F_earth*r^2/G*m2=5.97x10^25kg

Wow this is 10x the mass for 10x the area. What is the average density?

Density
V_earth=(4/3)*pi*r^3=1.08x10^12km^3
rho_earth=5.972x10^24kg/1.08x10^12km^3=55.1x10^12kg/km^3 (5.51g/cm^3)

V_scifi_earth=(4/3)*pi*r^3=34.3x10^12km^3
rho_scifi_earth=59.7x10^24kg/34.3x10^12km^3=1.74x10^12kg/km^3

And a 30x reduction in average density.

Many stones have a density of 2-3g/cm^3, and many are much higher. The iron/nickel core of earth gives a reasonable upper boundary of 10-12g/cm^3 with its mantle being around 5. Water of course is 1g/cm^3.

Conclusion
The materials that are available (metals, stone, water, etc) make it unlikely that a planet of any construction could exist like this. To make this imaginary planet out of materials for planet building and meeting the exceptionally low density required for an earth gravity of 1 the core would have to be very small, the mantle also on the smaller side with an incredible amount of water. Or, more likely, the planet would be make of gas and would not be a rocky planet at all.

Let's start with our upper boundary. What would the mass of this planet be if it were made from solid iron-nickle?
m_scifi_earth=12x10^12kg/km^3*34.3x10^12km^3=4.12x10^26kg

OK that's encouraging. If it were less we'd be done. And if it were 100% water?

m_scifi_earth=1x10^12kg/km^3*34.3x10^12km^3=3.43x10^25kg

Which, unfortunately is only barely smaller than our mass requirement of 5.97x10^25kg. Which means no planet building material will due for construction of our planet. And without entertaining composite or engineered materials means that the 10x planet is unfortunately not possible.