Home / 8,961.28-13,447.32-3,121.99

Finding the Fourth Proportional to 8,961.28, 13,447.32 and 3,121.99

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Solution

The fourth proportional to 8,961.28, 13,447.32 and 3,121.99 is: 4,684.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,961.28 : 13,447.32 = 3,121.99 : x
  2. Step 2: Convert to fraction form
    8,961.28/13,447.32 = 3,121.99/x
  3. Step 3: Cross multiply
    8,961.28x = 13,447.32 × 3,121.99
  4. Step 4: Simplify right side
    8,961.28x = 41,982,398.57
  5. Step 5: Solve for x
    x = 41,982,398.57/8,961.28
  6. Step 6: Final answer
    x = 4,684.87

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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.