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Finding the Third Proportional to 13.38 and 20.63

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Solution

The third proportional to 13.38 and 20.63 is: 31.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.38 : 20.63 = 20.63 : x
  2. Step 2: Convert to fraction form
    13.38/20.63 = 20.63/x
  3. Step 3: Cross multiply
    13.38x = 20.63 × 20.63
  4. Step 4: Simplify right side
    13.38x = 425.39
  5. Step 5: Solve for x
    x = 425.39/13.38
  6. Step 6: Final answer
    x = 31.80

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.