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Finding the Third Proportional to 20.75 and 27

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Solution

The third proportional to 20.75 and 27 is: 35.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.75 : 27 = 27 : x
  2. Step 2: Convert to fraction form
    20.75/27 = 27/x
  3. Step 3: Cross multiply
    20.75x = 27 × 27
  4. Step 4: Simplify right side
    20.75x = 729
  5. Step 5: Solve for x
    x = 729/20.75
  6. Step 6: Final answer
    x = 35.13

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.