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Finding the Fourth Proportional to 11,691.99, 17,546.85 and 8,579.88

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Solution

The fourth proportional to 11,691.99, 17,546.85 and 8,579.88 is: 12,876.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,691.99 : 17,546.85 = 8,579.88 : x
  2. Step 2: Convert to fraction form
    11,691.99/17,546.85 = 8,579.88/x
  3. Step 3: Cross multiply
    11,691.99x = 17,546.85 × 8,579.88
  4. Step 4: Simplify right side
    11,691.99x = 150,549,867.38
  5. Step 5: Solve for x
    x = 150,549,867.38/11,691.99
  6. Step 6: Final answer
    x = 12,876.33

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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.