Home / 20,728.60-28,604.42-11,774.92

Finding the Fourth Proportional to 20,728.60, 28,604.42 and 11,774.92

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Solution

The fourth proportional to 20,728.60, 28,604.42 and 11,774.92 is: 16,248.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.60 : 28,604.42 = 11,774.92 : x
  2. Step 2: Convert to fraction form
    20,728.60/28,604.42 = 11,774.92/x
  3. Step 3: Cross multiply
    20,728.60x = 28,604.42 × 11,774.92
  4. Step 4: Simplify right side
    20,728.60x = 336,814,757.15
  5. Step 5: Solve for x
    x = 336,814,757.15/20,728.60
  6. Step 6: Final answer
    x = 16,248.79

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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.