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Finding the Fourth Proportional to 3,988.91, 6,013.24 and 3,721.31

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Solution

The fourth proportional to 3,988.91, 6,013.24 and 3,721.31 is: 5,609.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.91 : 6,013.24 = 3,721.31 : x
  2. Step 2: Convert to fraction form
    3,988.91/6,013.24 = 3,721.31/x
  3. Step 3: Cross multiply
    3,988.91x = 6,013.24 × 3,721.31
  4. Step 4: Simplify right side
    3,988.91x = 22,377,113.32
  5. Step 5: Solve for x
    x = 22,377,113.32/3,988.91
  6. Step 6: Final answer
    x = 5,609.83

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.