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Finding the Fourth Proportional to 28,691.31, 43,024.80 and 11,149.14

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Solution

The fourth proportional to 28,691.31, 43,024.80 and 11,149.14 is: 16,718.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,691.31 : 43,024.80 = 11,149.14 : x
  2. Step 2: Convert to fraction form
    28,691.31/43,024.80 = 11,149.14/x
  3. Step 3: Cross multiply
    28,691.31x = 43,024.80 × 11,149.14
  4. Step 4: Simplify right side
    28,691.31x = 479,689,518.67
  5. Step 5: Solve for x
    x = 479,689,518.67/28,691.31
  6. Step 6: Final answer
    x = 16,718.98

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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.