Thread: Ratios and scales

The earth's diameter is about 13,000 km. If a globe has a diameter of 0.5 m write the globe scale as a ratio. What distance on earth would 1 centimeter on the globe represent?

Any help would be greatly appreciated. Thanks

The ratio is 13000km:0.5m

Convert to one unit of measurement, we shall use centimeters
So multiply by

1,300,000,000cm:500cm

Divide both sides by 500 to get it down to 1cm

2,600,000cm:1cm

So one cm on the globe represents 26km on the earth

I-Think, thanks so much for the help. I was forgetting to convert the m to cm. Great explanation as well