Rachille's Proportion Problems

http://en.wikipedia.org/wiki/Lemon 

1)To make lemonade, you need 6 lemons and 8 cups of water. How many lemons would you need if you have 24 cups of water?


Let x be the amount of lemons for 24 cups of water. 
Word ratio, ratio table, find x (cross product)

You would need 18 lemons to make lemonade with 24 cups of water.

http://commons.wikimedia.org/wiki/File:Feet_on_scale.jpg

2) The ratio of an objects weight on Earth to its weight on the moon is 6:1. the first person to walk on the moon was Neil Armstrong. He weighed 165 lb on Earth. How much did he weigh on the moon?


Let x be how much Neil weighed on the moon. 
Word ratio, ratio table, find x (cross product) 

Neil Armstrong weighed 27.5 lb on the moon.


A Word Problem for You
*At the Copy Shoppe, 18 copies cost $1.08. At that rate, how much will 40 copies cost?