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Finding the Fourth Proportional to 12,461.96, 18,680.34 and 8,082.20

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Solution

The fourth proportional to 12,461.96, 18,680.34 and 8,082.20 is: 12,115.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,461.96 : 18,680.34 = 8,082.20 : x
  2. Step 2: Convert to fraction form
    12,461.96/18,680.34 = 8,082.20/x
  3. Step 3: Cross multiply
    12,461.96x = 18,680.34 × 8,082.20
  4. Step 4: Simplify right side
    12,461.96x = 150,978,243.95
  5. Step 5: Solve for x
    x = 150,978,243.95/12,461.96
  6. Step 6: Final answer
    x = 12,115.13

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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.