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Finding the Third Proportional to 11.75 and 18.22

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Solution

The third proportional to 11.75 and 18.22 is: 28.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.75 : 18.22 = 18.22 : x
  2. Step 2: Convert to fraction form
    11.75/18.22 = 18.22/x
  3. Step 3: Cross multiply
    11.75x = 18.22 × 18.22
  4. Step 4: Simplify right side
    11.75x = 331.92
  5. Step 5: Solve for x
    x = 331.92/11.75
  6. Step 6: Final answer
    x = 28.25

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.