When working with the Measurement Tool in Acrobat DC Pro. It should be possible to enter a measurement on a page when the scale is set. Rather than just stretching the line.

For instance, if I wanted to see how far 22.22" is on a .125"=12" Scale.

Currently the only way to find this measurement, is to stretch the measurement line. If Adobe would allow me to enter the 22.22", and then have the program measure that out, it would be an excellent resource.