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Finding the Third Proportional to 18.87 and 40.94

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Solution

The third proportional to 18.87 and 40.94 is: 88.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.87 : 40.94 = 40.94 : x
  2. Step 2: Convert to fraction form
    18.87/40.94 = 40.94/x
  3. Step 3: Cross multiply
    18.87x = 40.94 × 40.94
  4. Step 4: Simplify right side
    18.87x = 1,675.68
  5. Step 5: Solve for x
    x = 1,675.68/18.87
  6. Step 6: Final answer
    x = 88.82

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.