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Finding the Fourth Proportional to 5,781.97, 7,979.06 and 3,129.32

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Solution

The fourth proportional to 5,781.97, 7,979.06 and 3,129.32 is: 4,318.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,781.97 : 7,979.06 = 3,129.32 : x
  2. Step 2: Convert to fraction form
    5,781.97/7,979.06 = 3,129.32/x
  3. Step 3: Cross multiply
    5,781.97x = 7,979.06 × 3,129.32
  4. Step 4: Simplify right side
    5,781.97x = 24,968,976.50
  5. Step 5: Solve for x
    x = 24,968,976.50/5,781.97
  6. Step 6: Final answer
    x = 4,318.42

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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.