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Finding the Fourth Proportional to 8,201.20, 12,270.30 and 8,180.20

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Solution

The fourth proportional to 8,201.20, 12,270.30 and 8,180.20 is: 12,238.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,201.20 : 12,270.30 = 8,180.20 : x
  2. Step 2: Convert to fraction form
    8,201.20/12,270.30 = 8,180.20/x
  3. Step 3: Cross multiply
    8,201.20x = 12,270.30 × 8,180.20
  4. Step 4: Simplify right side
    8,201.20x = 100,373,508.06
  5. Step 5: Solve for x
    x = 100,373,508.06/8,201.20
  6. Step 6: Final answer
    x = 12,238.88

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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.