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Finding the Fourth Proportional to 14,979.52, 20,672.76 and 8,691.90

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Solution

The fourth proportional to 14,979.52, 20,672.76 and 8,691.90 is: 11,995.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,979.52 : 20,672.76 = 8,691.90 : x
  2. Step 2: Convert to fraction form
    14,979.52/20,672.76 = 8,691.90/x
  3. Step 3: Cross multiply
    14,979.52x = 20,672.76 × 8,691.90
  4. Step 4: Simplify right side
    14,979.52x = 179,685,562.64
  5. Step 5: Solve for x
    x = 179,685,562.64/14,979.52
  6. Step 6: Final answer
    x = 11,995.42

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1.5x scale

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.