Home / 20,620.43-28,454.46-12,122.83

Finding the Fourth Proportional to 20,620.43, 28,454.46 and 12,122.83

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Solution

The fourth proportional to 20,620.43, 28,454.46 and 12,122.83 is: 16,728.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.43 : 28,454.46 = 12,122.83 : x
  2. Step 2: Convert to fraction form
    20,620.43/28,454.46 = 12,122.83/x
  3. Step 3: Cross multiply
    20,620.43x = 28,454.46 × 12,122.83
  4. Step 4: Simplify right side
    20,620.43x = 344,948,581.32
  5. Step 5: Solve for x
    x = 344,948,581.32/20,620.43
  6. Step 6: Final answer
    x = 16,728.49

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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.