Home / 20,129.55-30,138.17-13,091.97

Finding the Fourth Proportional to 20,129.55, 30,138.17 and 13,091.97

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Solution

The fourth proportional to 20,129.55, 30,138.17 and 13,091.97 is: 19,601.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.55 : 30,138.17 = 13,091.97 : x
  2. Step 2: Convert to fraction form
    20,129.55/30,138.17 = 13,091.97/x
  3. Step 3: Cross multiply
    20,129.55x = 30,138.17 × 13,091.97
  4. Step 4: Simplify right side
    20,129.55x = 394,567,952.04
  5. Step 5: Solve for x
    x = 394,567,952.04/20,129.55
  6. Step 6: Final answer
    x = 19,601.43

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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.