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Finding the Third Proportional to 21.25 and 29.75

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Solution

The third proportional to 21.25 and 29.75 is: 41.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.25 : 29.75 = 29.75 : x
  2. Step 2: Convert to fraction form
    21.25/29.75 = 29.75/x
  3. Step 3: Cross multiply
    21.25x = 29.75 × 29.75
  4. Step 4: Simplify right side
    21.25x = 885.06
  5. Step 5: Solve for x
    x = 885.06/21.25
  6. Step 6: Final answer
    x = 41.65

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.