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Finding the Third Proportional to 5.61 and 8.11

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Solution

The third proportional to 5.61 and 8.11 is: 11.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.61 : 8.11 = 8.11 : x
  2. Step 2: Convert to fraction form
    5.61/8.11 = 8.11/x
  3. Step 3: Cross multiply
    5.61x = 8.11 × 8.11
  4. Step 4: Simplify right side
    5.61x = 65.76
  5. Step 5: Solve for x
    x = 65.76/5.61
  6. Step 6: Final answer
    x = 11.73

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.