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Finding the Third Proportional to 11.87 and 18.43

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Solution

The third proportional to 11.87 and 18.43 is: 28.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.87 : 18.43 = 18.43 : x
  2. Step 2: Convert to fraction form
    11.87/18.43 = 18.43/x
  3. Step 3: Cross multiply
    11.87x = 18.43 × 18.43
  4. Step 4: Simplify right side
    11.87x = 339.69
  5. Step 5: Solve for x
    x = 339.69/11.87
  6. Step 6: Final answer
    x = 28.63

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.