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Finding the Third Proportional to 7.87 and 16.69

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Solution

The third proportional to 7.87 and 16.69 is: 35.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.87 : 16.69 = 16.69 : x
  2. Step 2: Convert to fraction form
    7.87/16.69 = 16.69/x
  3. Step 3: Cross multiply
    7.87x = 16.69 × 16.69
  4. Step 4: Simplify right side
    7.87x = 278.57
  5. Step 5: Solve for x
    x = 278.57/7.87
  6. Step 6: Final answer
    x = 35.39

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.