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Finding the Third Proportional to 18.87 and 37.02

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Solution

The third proportional to 18.87 and 37.02 is: 72.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.87 : 37.02 = 37.02 : x
  2. Step 2: Convert to fraction form
    18.87/37.02 = 37.02/x
  3. Step 3: Cross multiply
    18.87x = 37.02 × 37.02
  4. Step 4: Simplify right side
    18.87x = 1,370.45
  5. Step 5: Solve for x
    x = 1,370.45/18.87
  6. Step 6: Final answer
    x = 72.64

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Why These Related Problems?

These problems maintain the same ratio (1.96) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.