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Finding the Fourth Proportional to 18,089.20, 27,141.90 and 8,223.40

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Solution

The fourth proportional to 18,089.20, 27,141.90 and 8,223.40 is: 12,338.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,089.20 : 27,141.90 = 8,223.40 : x
  2. Step 2: Convert to fraction form
    18,089.20/27,141.90 = 8,223.40/x
  3. Step 3: Cross multiply
    18,089.20x = 27,141.90 × 8,223.40
  4. Step 4: Simplify right side
    18,089.20x = 223,198,700.46
  5. Step 5: Solve for x
    x = 223,198,700.46/18,089.20
  6. Step 6: Final answer
    x = 12,338.78

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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.