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Finding the Third Proportional to 7.94 and 10.10

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Solution

The third proportional to 7.94 and 10.10 is: 12.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.94 : 10.10 = 10.10 : x
  2. Step 2: Convert to fraction form
    7.94/10.10 = 10.10/x
  3. Step 3: Cross multiply
    7.94x = 10.10 × 10.10
  4. Step 4: Simplify right side
    7.94x = 102.07
  5. Step 5: Solve for x
    x = 102.07/7.94
  6. Step 6: Final answer
    x = 12.86

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.