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Finding the Fourth Proportional to 8,711.87, 13,068.52 and 2,789.62

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Solution

The fourth proportional to 8,711.87, 13,068.52 and 2,789.62 is: 4,184.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,711.87 : 13,068.52 = 2,789.62 : x
  2. Step 2: Convert to fraction form
    8,711.87/13,068.52 = 2,789.62/x
  3. Step 3: Cross multiply
    8,711.87x = 13,068.52 × 2,789.62
  4. Step 4: Simplify right side
    8,711.87x = 36,456,165.12
  5. Step 5: Solve for x
    x = 36,456,165.12/8,711.87
  6. Step 6: Final answer
    x = 4,184.66

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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.