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Mathematics 7 Online
OpenStudy (anonymous):

Find the missing value of the following proportion: 7/12 = x/54

OpenStudy (johnweldon1993):

We can cross multiply to solve this type of problem \[\large \frac{7}{12} = \frac{x}{54}\] Multiply 7 by 54...and then multiply 12 by x....so now we have \[\large 12x = 378\] Now just divide both sides by 12 to solve for 'x'

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