What is 5/4= x/12 solve for proportion?

asked Jul 13, 2015 112k views

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$(5)/(4) = (x)/(12) \\ \\4*x=5*12 \\ \\4x=60 \ \ \ /:4 \\ \\x=60:4 \\ \\x=15$

Gladia answered Jul 15, 2015

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4 votes

$(5)/(4)=(x)/(12)\ \ \ \ \ |cross\ multiply\\\\4\cdot x=5\cdot12\\\\4x=60\ \ \ \ \ |divide\ both\ sides\ by\ 4\\\\\boxed{x=15}$

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