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Finding the Fourth Proportional to 20,610.57, 30,917.48 and 8,129.73

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Solution

The fourth proportional to 20,610.57, 30,917.48 and 8,129.73 is: 12,195.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,610.57 : 30,917.48 = 8,129.73 : x
  2. Step 2: Convert to fraction form
    20,610.57/30,917.48 = 8,129.73/x
  3. Step 3: Cross multiply
    20,610.57x = 30,917.48 × 8,129.73
  4. Step 4: Simplify right side
    20,610.57x = 251,350,724.03
  5. Step 5: Solve for x
    x = 251,350,724.03/20,610.57
  6. Step 6: Final answer
    x = 12,195.23

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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.