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Finding the Fourth Proportional to 19,061.26, 28,591.92 and 7,961.90

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Solution

The fourth proportional to 19,061.26, 28,591.92 and 7,961.90 is: 11,942.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,061.26 : 28,591.92 = 7,961.90 : x
  2. Step 2: Convert to fraction form
    19,061.26/28,591.92 = 7,961.90/x
  3. Step 3: Cross multiply
    19,061.26x = 28,591.92 × 7,961.90
  4. Step 4: Simplify right side
    19,061.26x = 227,646,007.85
  5. Step 5: Solve for x
    x = 227,646,007.85/19,061.26
  6. Step 6: Final answer
    x = 11,942.86

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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.