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Finding the Fourth Proportional to 18,002.72, 27,000.97 and 8,139.71

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Solution

The fourth proportional to 18,002.72, 27,000.97 and 8,139.71 is: 12,208.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,002.72 : 27,000.97 = 8,139.71 : x
  2. Step 2: Convert to fraction form
    18,002.72/27,000.97 = 8,139.71/x
  3. Step 3: Cross multiply
    18,002.72x = 27,000.97 × 8,139.71
  4. Step 4: Simplify right side
    18,002.72x = 219,780,112.67
  5. Step 5: Solve for x
    x = 219,780,112.67/18,002.72
  6. Step 6: Final answer
    x = 12,208.16

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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.