Home / 20,455.30-28,227.57-11,380.61

Finding the Fourth Proportional to 20,455.30, 28,227.57 and 11,380.61

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Solution

The fourth proportional to 20,455.30, 28,227.57 and 11,380.61 is: 15,704.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.30 : 28,227.57 = 11,380.61 : x
  2. Step 2: Convert to fraction form
    20,455.30/28,227.57 = 11,380.61/x
  3. Step 3: Cross multiply
    20,455.30x = 28,227.57 × 11,380.61
  4. Step 4: Simplify right side
    20,455.30x = 321,246,993.31
  5. Step 5: Solve for x
    x = 321,246,993.31/20,455.30
  6. Step 6: Final answer
    x = 15,704.83

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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.