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Finding the Third Proportional to 8.38 and 18.51

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Solution

The third proportional to 8.38 and 18.51 is: 40.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.38 : 18.51 = 18.51 : x
  2. Step 2: Convert to fraction form
    8.38/18.51 = 18.51/x
  3. Step 3: Cross multiply
    8.38x = 18.51 × 18.51
  4. Step 4: Simplify right side
    8.38x = 342.61
  5. Step 5: Solve for x
    x = 342.61/8.38
  6. Step 6: Final answer
    x = 40.86

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.