Home / 20,843.46-28,789.22-15,169.21

Finding the Fourth Proportional to 20,843.46, 28,789.22 and 15,169.21

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Solution

The fourth proportional to 20,843.46, 28,789.22 and 15,169.21 is: 20,951.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,843.46 : 28,789.22 = 15,169.21 : x
  2. Step 2: Convert to fraction form
    20,843.46/28,789.22 = 15,169.21/x
  3. Step 3: Cross multiply
    20,843.46x = 28,789.22 × 15,169.21
  4. Step 4: Simplify right side
    20,843.46x = 436,709,689.87
  5. Step 5: Solve for x
    x = 436,709,689.87/20,843.46
  6. Step 6: Final answer
    x = 20,951.88

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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.