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Finding the Fourth Proportional to 18,620.92, 27,940.38 and 8,231.32

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Solution

The fourth proportional to 18,620.92, 27,940.38 and 8,231.32 is: 12,350.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.92 : 27,940.38 = 8,231.32 : x
  2. Step 2: Convert to fraction form
    18,620.92/27,940.38 = 8,231.32/x
  3. Step 3: Cross multiply
    18,620.92x = 27,940.38 × 8,231.32
  4. Step 4: Simplify right side
    18,620.92x = 229,986,208.70
  5. Step 5: Solve for x
    x = 229,986,208.70/18,620.92
  6. Step 6: Final answer
    x = 12,350.96

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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.