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Finding the Third Proportional to 8.79 and 18.94

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Solution

The third proportional to 8.79 and 18.94 is: 40.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.79 : 18.94 = 18.94 : x
  2. Step 2: Convert to fraction form
    8.79/18.94 = 18.94/x
  3. Step 3: Cross multiply
    8.79x = 18.94 × 18.94
  4. Step 4: Simplify right side
    8.79x = 358.80
  5. Step 5: Solve for x
    x = 358.80/8.79
  6. Step 6: Final answer
    x = 40.83

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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.