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Finding the Third Proportional to 20.21 and 25.92

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Solution

The third proportional to 20.21 and 25.92 is: 33.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.21 : 25.92 = 25.92 : x
  2. Step 2: Convert to fraction form
    20.21/25.92 = 25.92/x
  3. Step 3: Cross multiply
    20.21x = 25.92 × 25.92
  4. Step 4: Simplify right side
    20.21x = 672.02
  5. Step 5: Solve for x
    x = 672.02/20.21
  6. Step 6: Final answer
    x = 33.25

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.