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Finding the Fourth Proportional to 18,491.22, 27,736.83 and 15,711.30

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Solution

The fourth proportional to 18,491.22, 27,736.83 and 15,711.30 is: 23,566.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.22 : 27,736.83 = 15,711.30 : x
  2. Step 2: Convert to fraction form
    18,491.22/27,736.83 = 15,711.30/x
  3. Step 3: Cross multiply
    18,491.22x = 27,736.83 × 15,711.30
  4. Step 4: Simplify right side
    18,491.22x = 435,781,657.18
  5. Step 5: Solve for x
    x = 435,781,657.18/18,491.22
  6. Step 6: Final answer
    x = 23,566.95

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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.