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Finding the Third Proportional to 8.63 and 18.85

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Solution

The third proportional to 8.63 and 18.85 is: 41.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.63 : 18.85 = 18.85 : x
  2. Step 2: Convert to fraction form
    8.63/18.85 = 18.85/x
  3. Step 3: Cross multiply
    8.63x = 18.85 × 18.85
  4. Step 4: Simplify right side
    8.63x = 355.18
  5. Step 5: Solve for x
    x = 355.18/8.63
  6. Step 6: Final answer
    x = 41.13

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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.