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Finding the Third Proportional to 6.68 and 11.36

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Solution

The third proportional to 6.68 and 11.36 is: 19.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.68 : 11.36 = 11.36 : x
  2. Step 2: Convert to fraction form
    6.68/11.36 = 11.36/x
  3. Step 3: Cross multiply
    6.68x = 11.36 × 11.36
  4. Step 4: Simplify right side
    6.68x = 128.98
  5. Step 5: Solve for x
    x = 128.98/6.68
  6. Step 6: Final answer
    x = 19.31

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Why These Related Problems?

These problems maintain the same ratio (1.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.