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Finding the Fourth Proportional to 17,939.32, 26,909 and 8,577.13

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Solution

The fourth proportional to 17,939.32, 26,909 and 8,577.13 is: 12,865.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,939.32 : 26,909 = 8,577.13 : x
  2. Step 2: Convert to fraction form
    17,939.32/26,909 = 8,577.13/x
  3. Step 3: Cross multiply
    17,939.32x = 26,909 × 8,577.13
  4. Step 4: Simplify right side
    17,939.32x = 230,801,991.17
  5. Step 5: Solve for x
    x = 230,801,991.17/17,939.32
  6. Step 6: Final answer
    x = 12,865.70

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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.