What is the actual number of kilometer that is represented by 5cm on the map with 4cn=5km?

Question

What is the actual number in km that represent by 5 cm?

Answer 1

Set this up as a proportion. 4cm/5km = 5cm/x

Then you cross multiply -- multiply the top of the first side by the bottom of the second, and the bottom of the first by the top of the second.

4x = 25

Divide both sides by 4 to get x by itself.

x = 6.25. The answer is 6.25 km.