Question

A Map has a scale of 3.5 inches = 20 kilometers. If the distance between two cities on the map is 4.9 inches, what is the actual distance between the cities ?

Answer 1

I would do this by setting up a proportion:

3.5 = 4.9

20 x

now solve it by cross mulitiplying

3.5x=20*4.9

3.5x=98

x=28

The answer is 28 kilometers.

Answer 2

27.93km

20km/3.5" = 5.71

5.71 X 4.9" = 27.93