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Finding the Fourth Proportional to 8,399.76, 11,591.70 and 4,623.30

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Solution

The fourth proportional to 8,399.76, 11,591.70 and 4,623.30 is: 6,380.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,399.76 : 11,591.70 = 4,623.30 : x
  2. Step 2: Convert to fraction form
    8,399.76/11,591.70 = 4,623.30/x
  3. Step 3: Cross multiply
    8,399.76x = 11,591.70 × 4,623.30
  4. Step 4: Simplify right side
    8,399.76x = 53,591,906.61
  5. Step 5: Solve for x
    x = 53,591,906.61/8,399.76
  6. Step 6: Final answer
    x = 6,380.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.