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Finding the Fourth Proportional to 20,600.12, 30,900.18 and 7,449.42

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Solution

The fourth proportional to 20,600.12, 30,900.18 and 7,449.42 is: 11,174.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,600.12 : 30,900.18 = 7,449.42 : x
  2. Step 2: Convert to fraction form
    20,600.12/30,900.18 = 7,449.42/x
  3. Step 3: Cross multiply
    20,600.12x = 30,900.18 × 7,449.42
  4. Step 4: Simplify right side
    20,600.12x = 230,188,418.90
  5. Step 5: Solve for x
    x = 230,188,418.90/20,600.12
  6. Step 6: Final answer
    x = 11,174.13

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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.