Home / 20,129.92-27,778.90-11,177.24

Finding the Fourth Proportional to 20,129.92, 27,778.90 and 11,177.24

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Solution

The fourth proportional to 20,129.92, 27,778.90 and 11,177.24 is: 15,424.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.92 : 27,778.90 = 11,177.24 : x
  2. Step 2: Convert to fraction form
    20,129.92/27,778.90 = 11,177.24/x
  3. Step 3: Cross multiply
    20,129.92x = 27,778.90 × 11,177.24
  4. Step 4: Simplify right side
    20,129.92x = 310,491,432.24
  5. Step 5: Solve for x
    x = 310,491,432.24/20,129.92
  6. Step 6: Final answer
    x = 15,424.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.