SOLUTION: A van travels 240 miles on 12 gallons of gas. Write and solve a proportion to find how many gallons the van needs to travel 420 miles.

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Question 423907: A van travels 240 miles on 12 gallons of gas. Write and solve a proportion to find how many gallons the van needs to travel 420 miles.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

Let x represent gallons the van needs to travel 420 miles

Question Sets Up the Proportion

  240/12 = 420/x    |Cross Multiplying 

  240x = 12*420

     x = 12*420/240

     x = 21 gal, the amount the van needs to travel 420 miles



CHECKING our Answer***

 240/12 = 420/21 = 20/1