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Finding the Third Proportional to 11.21 and 15.96

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Solution

The third proportional to 11.21 and 15.96 is: 22.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.21 : 15.96 = 15.96 : x
  2. Step 2: Convert to fraction form
    11.21/15.96 = 15.96/x
  3. Step 3: Cross multiply
    11.21x = 15.96 × 15.96
  4. Step 4: Simplify right side
    11.21x = 254.88
  5. Step 5: Solve for x
    x = 254.88/11.21
  6. Step 6: Final answer
    x = 22.73

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.