# math

posted by deedee

4. If 1 gallon of water weighs 8.34lbs, how much does 3.75 gallons weigh?
31.275lbs

1. Feliz

Set up a proportion and solve for a letter of choice.

I will let w = weight for 3.75 gallons of water since we are searching for weight.

So, w = weight we are searching for.

1 gallon/3.75 gallons = 8.34 weights/w

Cross-multiply to find w.

w = 8.34 times 3.75

w = 31.275 IBS

Is this clear?

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