Home / 20,454.60-28,229.67-11,380.86

Finding the Fourth Proportional to 20,454.60, 28,229.67 and 11,380.86

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Solution

The fourth proportional to 20,454.60, 28,229.67 and 11,380.86 is: 15,706.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,454.60 : 28,229.67 = 11,380.86 : x
  2. Step 2: Convert to fraction form
    20,454.60/28,229.67 = 11,380.86/x
  3. Step 3: Cross multiply
    20,454.60x = 28,229.67 × 11,380.86
  4. Step 4: Simplify right side
    20,454.60x = 321,277,922.12
  5. Step 5: Solve for x
    x = 321,277,922.12/20,454.60
  6. Step 6: Final answer
    x = 15,706.88

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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.