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Finding the Fourth Proportional to 18,714.90, 25,826.39 and 10,331.38

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Solution

The fourth proportional to 18,714.90, 25,826.39 and 10,331.38 is: 14,257.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,714.90 : 25,826.39 = 10,331.38 : x
  2. Step 2: Convert to fraction form
    18,714.90/25,826.39 = 10,331.38/x
  3. Step 3: Cross multiply
    18,714.90x = 25,826.39 × 10,331.38
  4. Step 4: Simplify right side
    18,714.90x = 266,822,249.12
  5. Step 5: Solve for x
    x = 266,822,249.12/18,714.90
  6. Step 6: Final answer
    x = 14,257.21

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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.