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Finding the Fourth Proportional to 28,871.80, 43,308.92 and 9,149.92

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Solution

The fourth proportional to 28,871.80, 43,308.92 and 9,149.92 is: 13,725.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,871.80 : 43,308.92 = 9,149.92 : x
  2. Step 2: Convert to fraction form
    28,871.80/43,308.92 = 9,149.92/x
  3. Step 3: Cross multiply
    28,871.80x = 43,308.92 × 9,149.92
  4. Step 4: Simplify right side
    28,871.80x = 396,273,067.89
  5. Step 5: Solve for x
    x = 396,273,067.89/28,871.80
  6. Step 6: Final answer
    x = 13,725.26

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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.