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Finding the Third Proportional to 13.72 and 22.17

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Solution

The third proportional to 13.72 and 22.17 is: 35.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.72 : 22.17 = 22.17 : x
  2. Step 2: Convert to fraction form
    13.72/22.17 = 22.17/x
  3. Step 3: Cross multiply
    13.72x = 22.17 × 22.17
  4. Step 4: Simplify right side
    13.72x = 491.50
  5. Step 5: Solve for x
    x = 491.50/13.72
  6. Step 6: Final answer
    x = 35.81

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Why These Related Problems?

These problems maintain the same ratio (1.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.