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Finding the Third Proportional to 20.11 and 31.08

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Solution

The third proportional to 20.11 and 31.08 is: 48.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.11 : 31.08 = 31.08 : x
  2. Step 2: Convert to fraction form
    20.11/31.08 = 31.08/x
  3. Step 3: Cross multiply
    20.11x = 31.08 × 31.08
  4. Step 4: Simplify right side
    20.11x = 965.85
  5. Step 5: Solve for x
    x = 965.85/20.11
  6. Step 6: Final answer
    x = 48.03

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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.