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Finding the Fourth Proportional to 18,591.29, 27,891.49 and 8,719.06

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Solution

The fourth proportional to 18,591.29, 27,891.49 and 8,719.06 is: 13,080.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,591.29 : 27,891.49 = 8,719.06 : x
  2. Step 2: Convert to fraction form
    18,591.29/27,891.49 = 8,719.06/x
  3. Step 3: Cross multiply
    18,591.29x = 27,891.49 × 8,719.06
  4. Step 4: Simplify right side
    18,591.29x = 243,187,551.92
  5. Step 5: Solve for x
    x = 243,187,551.92/18,591.29
  6. Step 6: Final answer
    x = 13,080.73

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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.