Relative width of one image wrt another?

Question

Suppose I have an image: 120: Original Width 70: Original Height I have another image: 20: Original Width 20: Original Height Both these images have to be relative to each other (or should I say these both are in aspect ratio with each other?) So what would be the height of second image if the height of first image decreases to 100? Now I do know the way to get aspect ratio with changing height for one single image, which would be (if I am not wrong): `Old Width/Old Height * New Width = New Height` but how do I apply something like this to two images?

Answer 1

If I read your non-standard wording correctly, image one is 120 x 70 and image two is 20 x 20.

They are not similar figures. They cannot be reduced by the same scale factor.