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Finding the Third Proportional to 16.45 and 21.73

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Solution

The third proportional to 16.45 and 21.73 is: 28.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.45 : 21.73 = 21.73 : x
  2. Step 2: Convert to fraction form
    16.45/21.73 = 21.73/x
  3. Step 3: Cross multiply
    16.45x = 21.73 × 21.73
  4. Step 4: Simplify right side
    16.45x = 472.04
  5. Step 5: Solve for x
    x = 472.04/16.45
  6. Step 6: Final answer
    x = 28.69

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.