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Finding the Third Proportional to 16.88 and 20.56

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Solution

The third proportional to 16.88 and 20.56 is: 25.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.88 : 20.56 = 20.56 : x
  2. Step 2: Convert to fraction form
    16.88/20.56 = 20.56/x
  3. Step 3: Cross multiply
    16.88x = 20.56 × 20.56
  4. Step 4: Simplify right side
    16.88x = 422.82
  5. Step 5: Solve for x
    x = 422.82/16.88
  6. Step 6: Final answer
    x = 25.06

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.