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Finding the Third Proportional to 18 and 36.38

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Solution

The third proportional to 18 and 36.38 is: 73.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18 : 36.38 = 36.38 : x
  2. Step 2: Convert to fraction form
    18/36.38 = 36.38/x
  3. Step 3: Cross multiply
    18x = 36.38 × 36.38
  4. Step 4: Simplify right side
    18x = 1,323.14
  5. Step 5: Solve for x
    x = 1,323.14/18
  6. Step 6: Final answer
    x = 73.51

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Why These Related Problems?

These problems maintain the same ratio (2.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.