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Finding the Third Proportional to 16.38 and 17.50

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Solution

The third proportional to 16.38 and 17.50 is: 18.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.38 : 17.50 = 17.50 : x
  2. Step 2: Convert to fraction form
    16.38/17.50 = 17.50/x
  3. Step 3: Cross multiply
    16.38x = 17.50 × 17.50
  4. Step 4: Simplify right side
    16.38x = 306.25
  5. Step 5: Solve for x
    x = 306.25/16.38
  6. Step 6: Final answer
    x = 18.70

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Why These Related Problems?

These problems maintain the same ratio (1.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.