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Finding the Fourth Proportional to 8,387.31, 12,580.15 and 2,543.97

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Solution

The fourth proportional to 8,387.31, 12,580.15 and 2,543.97 is: 3,815.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.31 : 12,580.15 = 2,543.97 : x
  2. Step 2: Convert to fraction form
    8,387.31/12,580.15 = 2,543.97/x
  3. Step 3: Cross multiply
    8,387.31x = 12,580.15 × 2,543.97
  4. Step 4: Simplify right side
    8,387.31x = 32,003,492.75
  5. Step 5: Solve for x
    x = 32,003,492.75/8,387.31
  6. Step 6: Final answer
    x = 3,815.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.