Home / 11,689.28-17,520.92-8,906.78

Finding the Fourth Proportional to 11,689.28, 17,520.92 and 8,906.78

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Solution

The fourth proportional to 11,689.28, 17,520.92 and 8,906.78 is: 13,350.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,689.28 : 17,520.92 = 8,906.78 : x
  2. Step 2: Convert to fraction form
    11,689.28/17,520.92 = 8,906.78/x
  3. Step 3: Cross multiply
    11,689.28x = 17,520.92 × 8,906.78
  4. Step 4: Simplify right side
    11,689.28x = 156,054,964.05
  5. Step 5: Solve for x
    x = 156,054,964.05/11,689.28
  6. Step 6: Final answer
    x = 13,350.26

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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.