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Finding the Fourth Proportional to 18,379.80, 27,581.04 and 8,517.24

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Solution

The fourth proportional to 18,379.80, 27,581.04 and 8,517.24 is: 12,781.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,379.80 : 27,581.04 = 8,517.24 : x
  2. Step 2: Convert to fraction form
    18,379.80/27,581.04 = 8,517.24/x
  3. Step 3: Cross multiply
    18,379.80x = 27,581.04 × 8,517.24
  4. Step 4: Simplify right side
    18,379.80x = 234,914,337.13
  5. Step 5: Solve for x
    x = 234,914,337.13/18,379.80
  6. Step 6: Final answer
    x = 12,781.11

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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.