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Finding the Fourth Proportional to 19,960, 29,939.88 and 5,168.88

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Solution

The fourth proportional to 19,960, 29,939.88 and 5,168.88 is: 7,753.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,960 : 29,939.88 = 5,168.88 : x
  2. Step 2: Convert to fraction form
    19,960/29,939.88 = 5,168.88/x
  3. Step 3: Cross multiply
    19,960x = 29,939.88 × 5,168.88
  4. Step 4: Simplify right side
    19,960x = 154,755,646.93
  5. Step 5: Solve for x
    x = 154,755,646.93/19,960
  6. Step 6: Final answer
    x = 7,753.29

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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.