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Finding the Third Proportional to 16 and 18.38

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Solution

The third proportional to 16 and 18.38 is: 21.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    16 : 18.38 = 18.38 : x
  2. Step 2: Convert to fraction form
    16/18.38 = 18.38/x
  3. Step 3: Cross multiply
    16x = 18.38 × 18.38
  4. Step 4: Simplify right side
    16x = 337.64
  5. Step 5: Solve for x
    x = 337.64/16
  6. Step 6: Final answer
    x = 21.10

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.