If 4.5 gallons cost $6.66 how much will 2 gallons cost

Question

If 4.5 gallons cost $6.66 how much will 2 gallons cost

Answer 1

Hi Taylor!

 

This question is asking you to set up a proportion. This is the easiest and fastest way to solve this problem. 

 

The first step is to determine which numbers we do know.

     We know that 4.5 gallons equals $6.66. 

 

Using this information, we put this in fraction form. At this point it is up to you as to which way you would like to write it. (E.g. you can write it with the gallons in the numerator or the denominator)

 

4.5 gallons / $6.66

 

Now, we have to find out how to use this information to get the correct answer.

 

We will then take the fraction above and set it equal to 2 gallons / $x.

 

(4.5 gallons / $6.66) = (2 gallons / $x)

 

Next, cross multiply to get rid of the fractions. 

 

We get:

     (4.5 gallons)($x) = (2 gallons)($6.66)

 

Finally simplify the equation to get the variable, x, by itself.

 

(4.5 gallons)($x) = 13.32        First, multiply the 2*$6.66 = 13.32

x = $2.96                              Divide both sides by 4.5 gallons (13.32/4.5=2.96)

 

Hope this helped!

Sara

Answer 2

This is a ratio problem

 

4.5: 6.66 = 2: x

 

(4.5/6.66) = 2/x, cross multiply or some people call it the butterfly

 

4.5x = 2(6.66)

 

4.5x = 13.32

 

x = 2.96

 

so it would be $2.96 for 2 gallons

Answer 3

$2.96.