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Finding the Fourth Proportional to 18,387.98, 25,375.17 and 10,834.63

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Solution

The fourth proportional to 18,387.98, 25,375.17 and 10,834.63 is: 14,951.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,387.98 : 25,375.17 = 10,834.63 : x
  2. Step 2: Convert to fraction form
    18,387.98/25,375.17 = 10,834.63/x
  3. Step 3: Cross multiply
    18,387.98x = 25,375.17 × 10,834.63
  4. Step 4: Simplify right side
    18,387.98x = 274,930,555.33
  5. Step 5: Solve for x
    x = 274,930,555.33/18,387.98
  6. Step 6: Final answer
    x = 14,951.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.