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Finding the Fourth Proportional to 18,489.92, 27,743.88 and 8,100.32

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Solution

The fourth proportional to 18,489.92, 27,743.88 and 8,100.32 is: 12,154.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,489.92 : 27,743.88 = 8,100.32 : x
  2. Step 2: Convert to fraction form
    18,489.92/27,743.88 = 8,100.32/x
  3. Step 3: Cross multiply
    18,489.92x = 27,743.88 × 8,100.32
  4. Step 4: Simplify right side
    18,489.92x = 224,734,306.04
  5. Step 5: Solve for x
    x = 224,734,306.04/18,489.92
  6. Step 6: Final answer
    x = 12,154.42

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1.5x scale

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.