Home / 20,517.85-28,314.57-11,086.39

Finding the Fourth Proportional to 20,517.85, 28,314.57 and 11,086.39

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Solution

The fourth proportional to 20,517.85, 28,314.57 and 11,086.39 is: 15,299.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.85 : 28,314.57 = 11,086.39 : x
  2. Step 2: Convert to fraction form
    20,517.85/28,314.57 = 11,086.39/x
  3. Step 3: Cross multiply
    20,517.85x = 28,314.57 × 11,086.39
  4. Step 4: Simplify right side
    20,517.85x = 313,906,365.70
  5. Step 5: Solve for x
    x = 313,906,365.70/20,517.85
  6. Step 6: Final answer
    x = 15,299.18

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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.