If 3.75 inches on a map are equal to 18.75 miles, how many miles are 5 inches equal to?

If 3.75 inches on a map are equal to 18.75 miles, how many miles are 5 inches equal to?

Set up a proportion of inches to miles where m is the number of miles for 5 inches:
3.75/18.75 = 5/m

Using our proportion calculator, we get:
m = 25 miles