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Finding the Third Proportional to 8.68 and 18.91

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Solution

The third proportional to 8.68 and 18.91 is: 41.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.68 : 18.91 = 18.91 : x
  2. Step 2: Convert to fraction form
    8.68/18.91 = 18.91/x
  3. Step 3: Cross multiply
    8.68x = 18.91 × 18.91
  4. Step 4: Simplify right side
    8.68x = 357.40
  5. Step 5: Solve for x
    x = 357.40/8.68
  6. Step 6: Final answer
    x = 41.18

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.