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Finding the Fourth Proportional to 18,651.35, 27,937.99 and 11,251.90

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Solution

The fourth proportional to 18,651.35, 27,937.99 and 11,251.90 is: 16,854.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651.35 : 27,937.99 = 11,251.90 : x
  2. Step 2: Convert to fraction form
    18,651.35/27,937.99 = 11,251.90/x
  3. Step 3: Cross multiply
    18,651.35x = 27,937.99 × 11,251.90
  4. Step 4: Simplify right side
    18,651.35x = 314,355,469.68
  5. Step 5: Solve for x
    x = 314,355,469.68/18,651.35
  6. Step 6: Final answer
    x = 16,854.30

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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.