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Finding the Fourth Proportional to 11,912.70, 17,863.28 and 3,591.17

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Solution

The fourth proportional to 11,912.70, 17,863.28 and 3,591.17 is: 5,385.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,912.70 : 17,863.28 = 3,591.17 : x
  2. Step 2: Convert to fraction form
    11,912.70/17,863.28 = 3,591.17/x
  3. Step 3: Cross multiply
    11,912.70x = 17,863.28 × 3,591.17
  4. Step 4: Simplify right side
    11,912.70x = 64,149,967.97
  5. Step 5: Solve for x
    x = 64,149,967.97/11,912.70
  6. Step 6: Final answer
    x = 5,385.01

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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.