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Finding the Fourth Proportional to 11,086.80, 15,301.08 and 8,689.20

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Solution

The fourth proportional to 11,086.80, 15,301.08 and 8,689.20 is: 11,992.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,086.80 : 15,301.08 = 8,689.20 : x
  2. Step 2: Convert to fraction form
    11,086.80/15,301.08 = 8,689.20/x
  3. Step 3: Cross multiply
    11,086.80x = 15,301.08 × 8,689.20
  4. Step 4: Simplify right side
    11,086.80x = 132,954,144.34
  5. Step 5: Solve for x
    x = 132,954,144.34/11,086.80
  6. Step 6: Final answer
    x = 11,992.11

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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.