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Finding the Fourth Proportional to 7,891.65, 11,839.30 and 2,344.87

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Solution

The fourth proportional to 7,891.65, 11,839.30 and 2,344.87 is: 3,517.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.65 : 11,839.30 = 2,344.87 : x
  2. Step 2: Convert to fraction form
    7,891.65/11,839.30 = 2,344.87/x
  3. Step 3: Cross multiply
    7,891.65x = 11,839.30 × 2,344.87
  4. Step 4: Simplify right side
    7,891.65x = 27,761,607.67
  5. Step 5: Solve for x
    x = 27,761,607.67/7,891.65
  6. Step 6: Final answer
    x = 3,517.85

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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.