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Finding the Fourth Proportional to 18,379.68, 27,572.25 and 8,519.96

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Solution

The fourth proportional to 18,379.68, 27,572.25 and 8,519.96 is: 12,781.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,379.68 : 27,572.25 = 8,519.96 : x
  2. Step 2: Convert to fraction form
    18,379.68/27,572.25 = 8,519.96/x
  3. Step 3: Cross multiply
    18,379.68x = 27,572.25 × 8,519.96
  4. Step 4: Simplify right side
    18,379.68x = 234,914,361.20
  5. Step 5: Solve for x
    x = 234,914,361.20/18,379.68
  6. Step 6: Final answer
    x = 12,781.20

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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.