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Finding the Third Proportional to 8.19 and 17.69

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Solution

The third proportional to 8.19 and 17.69 is: 38.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.19 : 17.69 = 17.69 : x
  2. Step 2: Convert to fraction form
    8.19/17.69 = 17.69/x
  3. Step 3: Cross multiply
    8.19x = 17.69 × 17.69
  4. Step 4: Simplify right side
    8.19x = 312.85
  5. Step 5: Solve for x
    x = 312.85/8.19
  6. Step 6: Final answer
    x = 38.21

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.