Finding the Fourth Proportional to 20,387,701.60, 28,128,694.87 and 11,565,700.81
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Solution
The fourth proportional to 20,387,701.60, 28,128,694.87 and 11,565,700.81 is: 15,957,074.29
Step by Step Solution
- Step 1: Write the proportion equation
20,387,701.60 : 28,128,694.87 = 11,565,700.81 : x - Step 2: Convert to fraction form
20,387,701.60/28,128,694.87 = 11,565,700.81/x - Step 3: Cross multiply
20,387,701.60x = 28,128,694.87 × 11,565,700.81 - Step 4: Simplify right side
20,387,701.60x = 325,328,068,986,337.19 - Step 5: Solve for x
x = 325,328,068,986,337.19/20,387,701.60 - Step 6: Final answer
x = 15,957,074.29
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.