Home / 20,377.64-28,120.50-11,425.66

Finding the Fourth Proportional to 20,377.64, 28,120.50 and 11,425.66

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Solution

The fourth proportional to 20,377.64, 28,120.50 and 11,425.66 is: 15,767.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.64 : 28,120.50 = 11,425.66 : x
  2. Step 2: Convert to fraction form
    20,377.64/28,120.50 = 11,425.66/x
  3. Step 3: Cross multiply
    20,377.64x = 28,120.50 × 11,425.66
  4. Step 4: Simplify right side
    20,377.64x = 321,295,201.73
  5. Step 5: Solve for x
    x = 321,295,201.73/20,377.64
  6. Step 6: Final answer
    x = 15,767.04

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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.