Finding the Fourth Proportional to 20,617,909.81, 28,429,398.96 and 13,165,772.92
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Solution
The fourth proportional to 20,617,909.81, 28,429,398.96 and 13,165,772.92 is: 18,153,877.60
Step by Step Solution
- Step 1: Write the proportion equation
20,617,909.81 : 28,429,398.96 = 13,165,772.92 : x - Step 2: Convert to fraction form
20,617,909.81/28,429,398.96 = 13,165,772.92/x - Step 3: Cross multiply
20,617,909.81x = 28,429,398.96 × 13,165,772.92 - Step 4: Simplify right side
20,617,909.81x = 374,295,010,959,444.19 - Step 5: Solve for x
x = 374,295,010,959,444.19/20,617,909.81 - Step 6: Final answer
x = 18,153,877.60
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.