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Finding the Fourth Proportional to 28,658.52, 42,996.32 and 13,676.88

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Solution

The fourth proportional to 28,658.52, 42,996.32 and 13,676.88 is: 20,519.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,658.52 : 42,996.32 = 13,676.88 : x
  2. Step 2: Convert to fraction form
    28,658.52/42,996.32 = 13,676.88/x
  3. Step 3: Cross multiply
    28,658.52x = 42,996.32 × 13,676.88
  4. Step 4: Simplify right side
    28,658.52x = 588,055,440.70
  5. Step 5: Solve for x
    x = 588,055,440.70/28,658.52
  6. Step 6: Final answer
    x = 20,519.40

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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.