I've finished my calculations, beyond a trivial division.
Nope. For example, you have not given a value on pressure, WHICH THE POINT OF THE CALCULATION WAS. If I want to calculate the roots for 2x^2+8x+8=0, then I can't just write that 2x^2+8x+8=0 -> x^2+4x+4=(x+2)^2 and say I'm done with it. Because I have not given the roots yet. Sure, anyone could finish it for me, but that still doesn't mean that I am done with the calculations. You have to finish your calculations, cause right now they don't prove anything.
Divide by the ratio of surface areas, do you see a difference? Feel free to confirm: run through with different lengths, the calculations are simple. Are the results the same?
All I get is the surface area for each surface again. Length^3/Length = Length^2 (w, b and l are all lengths). So I do not get a pressure. You are horrible at math if you think that volume/length gives a pressure.
Also, I just realized, if denpressure and pressure works the way TheBigOne describes it, we'd get blasted off into space. If pressure increases between two surfaces with decreased distance, then the difference in distance between our feet and the ground and the distance between our head/shoulders and the nothing above us (so infinite distance, or if there is a dome, a few thousand miles) should create an extreme difference in pressure on our feet and our head/shoulders and make us fly up at great speeds. This does not happen.
There is no dome, the fluid that composes space makes up the higher border. I do not see why there would be an extreme difference in force, when we are above the ground, we are the surface onto which the force acts.
You state that with half the distance, you get double the force. In ANY CASE, the pressure under our feet would be greater than the pressure above us (distance under our feet is shorter than distance above us) so we'd fell up, not down. Your model just doesn't work. It contradicts itself completely.