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Finding the Third Proportional to 18 and 37.88

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Solution

The third proportional to 18 and 37.88 is: 79.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18 : 37.88 = 37.88 : x
  2. Step 2: Convert to fraction form
    18/37.88 = 37.88/x
  3. Step 3: Cross multiply
    18x = 37.88 × 37.88
  4. Step 4: Simplify right side
    18x = 1,434.52
  5. Step 5: Solve for x
    x = 1,434.52/18
  6. Step 6: Final answer
    x = 79.70

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.