# The scale on a map is 1 cm = 10 miles. Find the length on the map of 300 miles

<-- Enter Map Scale Problem

The scale on a map is 1 cm = 10 miles. Find the length on the map of 300 miles
Map Scale = the relationship between a distance on a map and the corresponding distance on the earth
Our scale is 1 cm to 10 miles
We need to find how many cm exist in 300 miles, so we set up a proportion

## Designate our missing cm measurement as x:

 1 cm 10 miles
 =
 x 300 miles

## Cross-Multiply:

10 miles(x) = 1 cm * 300 miles

## Divide each side of the equation by 10 miles to isolate x:

 10 miles(x) 10 miles
 =
 1 cm * 300 miles 10 miles

## Cancel the miles measurement on the right side and simplify:

 x  = 1 cm * 300 miles 10 miles

 x  = 300 cm 10

x = 30 cm

x = 30 cm

### How does the Map Scale Calculator work?

Solves map scale problems based on unit measurements
This calculator has 1 input.

### What 1 formula is used for the Map Scale Calculator?

1. Standard Map Scale/Standard Map Distance = x/Target Distance

For more math formulas, check out our Formula Dossier

### What 3 concepts are covered in the Map Scale Calculator?

cross multiply
to clear an equation of fractions when each side consists of a fraction with a single denominator by multiplying the numerator of each side by the denominator of the other side and equating the two products obtained.
a/b = c/d → ad = bc
map scale
the relationship between a distance on a map and the corresponding distance on the earth
measure
estimate or assess the extent, quality, value, or effect of (something).