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Finding the Fourth Proportional to 28,871.77, 43,308.87 and 9,149.89

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Solution

The fourth proportional to 28,871.77, 43,308.87 and 9,149.89 is: 13,725.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,871.77 : 43,308.87 = 9,149.89 : x
  2. Step 2: Convert to fraction form
    28,871.77/43,308.87 = 9,149.89/x
  3. Step 3: Cross multiply
    28,871.77x = 43,308.87 × 9,149.89
  4. Step 4: Simplify right side
    28,871.77x = 396,271,396.52
  5. Step 5: Solve for x
    x = 396,271,396.52/28,871.77
  6. Step 6: Final answer
    x = 13,725.22

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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.