math
posted by Anonymous on .
Ruth makes a scale drawing of her room. She uses the scale 3/2 in : 1 ft. In the drawing, the dimensions of her room are 18 in by 24 in. What are the actual dimensions of her room?

Set up a proportion, cross multiply, and solve for x.
(3/2)/1 = 18/x
(3/2)x = 18
x = 18/(3/2)
x = 18 * (2/3)
x = 36/3
x = 12 feet
Figure the other dimension the same way.