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Finding the Fourth Proportional to 18,620.70, 27,934.96 and 5,471.96

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Solution

The fourth proportional to 18,620.70, 27,934.96 and 5,471.96 is: 8,209.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.70 : 27,934.96 = 5,471.96 : x
  2. Step 2: Convert to fraction form
    18,620.70/27,934.96 = 5,471.96/x
  3. Step 3: Cross multiply
    18,620.70x = 27,934.96 × 5,471.96
  4. Step 4: Simplify right side
    18,620.70x = 152,858,983.72
  5. Step 5: Solve for x
    x = 152,858,983.72/18,620.70
  6. Step 6: Final answer
    x = 8,209.09

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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.