Set up proportion equation: Set up the proportion as an equation.We have the proportion 38=n12. To solve for n, we need to find the value of n that makes this equation true.
Cross-multiply to eliminate fractions: Cross-multiply to eliminate the fractions. Cross-multiplication gives us 8×n=12×3.
Perform multiplication on right side: Perform the multiplication on the right side of the equation. 12×3=36, so the equation now reads 8×n=36.
Divide both sides to solve: Divide both sides of the equation by 8 to solve for n. 8×n/8=36/8, which simplifies to n=36/8.
Calculate value of n: Calculate the value of n.836=4.5, so n=4.5.
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