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Finding the Third Proportional to 18.76 and 25.21

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Solution

The third proportional to 18.76 and 25.21 is: 33.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.76 : 25.21 = 25.21 : x
  2. Step 2: Convert to fraction form
    18.76/25.21 = 25.21/x
  3. Step 3: Cross multiply
    18.76x = 25.21 × 25.21
  4. Step 4: Simplify right side
    18.76x = 635.39
  5. Step 5: Solve for x
    x = 635.39/18.76
  6. Step 6: Final answer
    x = 33.88

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.