Finding the Fourth Proportional to 20,639,714.79, 28,482,824.64 and 11,347,442.96
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Solution
The fourth proportional to 20,639,714.79, 28,482,824.64 and 11,347,442.96 is: 15,659,481.30
Step by Step Solution
- Step 1: Write the proportion equation
20,639,714.79 : 28,482,824.64 = 11,347,442.96 : x - Step 2: Convert to fraction form
20,639,714.79/28,482,824.64 = 11,347,442.96/x - Step 3: Cross multiply
20,639,714.79x = 28,482,824.64 × 11,347,442.96 - Step 4: Simplify right side
20,639,714.79x = 323,207,227,842,221.31 - Step 5: Solve for x
x = 323,207,227,842,221.31/20,639,714.79 - Step 6: Final answer
x = 15,659,481.30
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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.