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Finding the Third Proportional to 21.38 and 33.19

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Solution

The third proportional to 21.38 and 33.19 is: 51.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.38 : 33.19 = 33.19 : x
  2. Step 2: Convert to fraction form
    21.38/33.19 = 33.19/x
  3. Step 3: Cross multiply
    21.38x = 33.19 × 33.19
  4. Step 4: Simplify right side
    21.38x = 1,101.41
  5. Step 5: Solve for x
    x = 1,101.41/21.38
  6. Step 6: Final answer
    x = 51.53

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.