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Finding the Fourth Proportional to 18,000.72, 27,015.54 and 8,140.86

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Solution

The fourth proportional to 18,000.72, 27,015.54 and 8,140.86 is: 12,217.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,000.72 : 27,015.54 = 8,140.86 : x
  2. Step 2: Convert to fraction form
    18,000.72/27,015.54 = 8,140.86/x
  3. Step 3: Cross multiply
    18,000.72x = 27,015.54 × 8,140.86
  4. Step 4: Simplify right side
    18,000.72x = 219,929,728.96
  5. Step 5: Solve for x
    x = 219,929,728.96/18,000.72
  6. Step 6: Final answer
    x = 12,217.83

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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.