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Finding the Fourth Proportional to 18,469.79, 27,704.43 and 8,471.71

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Solution

The fourth proportional to 18,469.79, 27,704.43 and 8,471.71 is: 12,707.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,469.79 : 27,704.43 = 8,471.71 : x
  2. Step 2: Convert to fraction form
    18,469.79/27,704.43 = 8,471.71/x
  3. Step 3: Cross multiply
    18,469.79x = 27,704.43 × 8,471.71
  4. Step 4: Simplify right side
    18,469.79x = 234,703,775.47
  5. Step 5: Solve for x
    x = 234,703,775.47/18,469.79
  6. Step 6: Final answer
    x = 12,707.44

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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.