Home / 20,589.83-28,414.52-12,520.70

Finding the Fourth Proportional to 20,589.83, 28,414.52 and 12,520.70

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Solution

The fourth proportional to 20,589.83, 28,414.52 and 12,520.70 is: 17,278.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,589.83 : 28,414.52 = 12,520.70 : x
  2. Step 2: Convert to fraction form
    20,589.83/28,414.52 = 12,520.70/x
  3. Step 3: Cross multiply
    20,589.83x = 28,414.52 × 12,520.70
  4. Step 4: Simplify right side
    20,589.83x = 355,769,680.56
  5. Step 5: Solve for x
    x = 355,769,680.56/20,589.83
  6. Step 6: Final answer
    x = 17,278.90

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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.