Home / 20,517.12-28,330.92-12,561.90

Finding the Fourth Proportional to 20,517.12, 28,330.92 and 12,561.90

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Solution

The fourth proportional to 20,517.12, 28,330.92 and 12,561.90 is: 17,346.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.12 : 28,330.92 = 12,561.90 : x
  2. Step 2: Convert to fraction form
    20,517.12/28,330.92 = 12,561.90/x
  3. Step 3: Cross multiply
    20,517.12x = 28,330.92 × 12,561.90
  4. Step 4: Simplify right side
    20,517.12x = 355,890,183.95
  5. Step 5: Solve for x
    x = 355,890,183.95/20,517.12
  6. Step 6: Final answer
    x = 17,346.01

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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.