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Finding the Third Proportional to 17.57 and 18.92

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Solution

The third proportional to 17.57 and 18.92 is: 20.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.57 : 18.92 = 18.92 : x
  2. Step 2: Convert to fraction form
    17.57/18.92 = 18.92/x
  3. Step 3: Cross multiply
    17.57x = 18.92 × 18.92
  4. Step 4: Simplify right side
    17.57x = 358.02
  5. Step 5: Solve for x
    x = 358.02/17.57
  6. Step 6: Final answer
    x = 20.38

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.