Home / 20,661.56-28,512.15-11,229.92

Finding the Fourth Proportional to 20,661.56, 28,512.15 and 11,229.92

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Solution

The fourth proportional to 20,661.56, 28,512.15 and 11,229.92 is: 15,496.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.56 : 28,512.15 = 11,229.92 : x
  2. Step 2: Convert to fraction form
    20,661.56/28,512.15 = 11,229.92/x
  3. Step 3: Cross multiply
    20,661.56x = 28,512.15 × 11,229.92
  4. Step 4: Simplify right side
    20,661.56x = 320,189,163.53
  5. Step 5: Solve for x
    x = 320,189,163.53/20,661.56
  6. Step 6: Final answer
    x = 15,496.85

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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.