The scales aren't designed that way.
If you look, one scale is either half or double than the scale next to it. 2257(x2) = 4514, and that (x2) is 9028.
As you zoom in...
At the fist zoom level, there is 1 tile, the next there is 4, then 16 and so forth.
The scales were picked probably from a dpi setting that's relevant to monitors, not ground units.