1. So you want to use a proportion…
It’s easy!

2. UNITS!!! cm Km cm Km Start with your formula =
Actual Height of Feature
Relief Globe Height of Feature =
Actual Earth Diameter
Relief Globe Diameter cm Km
UNITS!!!

3. UNITS!!! Then just substitute and cross-multiply! = 8.8 km X cm
124.08 =
12,756X
12,756
12,756
9.73 x 10-3 cm = X
UNITS!!!

4. But what is that number? 9.73 x 10-3 cm
Move the decimal three places left! cm
Just for kicks, how many millimeters?
There are 10 mm in one cm. Move the
decimal one place to the right. mm

5. You’re done! Now you can eat corn!
Try this:
A town, not too far from here, wants to build a scale statue of their town mascot, the emu (Dromaius novaehollandiae).
The model is 14 cm tall, and the scale is 1 cm = 1.2 m. How tall, in meters, will the actual statue be?
16.8 m