Home / 20,963.28-31,436.82-8,480.10

Finding the Fourth Proportional to 20,963.28, 31,436.82 and 8,480.10

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Solution

The fourth proportional to 20,963.28, 31,436.82 and 8,480.10 is: 12,716.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.28 : 31,436.82 = 8,480.10 : x
  2. Step 2: Convert to fraction form
    20,963.28/31,436.82 = 8,480.10/x
  3. Step 3: Cross multiply
    20,963.28x = 31,436.82 × 8,480.10
  4. Step 4: Simplify right side
    20,963.28x = 266,587,377.28
  5. Step 5: Solve for x
    x = 266,587,377.28/20,963.28
  6. Step 6: Final answer
    x = 12,716.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.