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Finding the Third Proportional to 18.50 and 36.50

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Solution

The third proportional to 18.50 and 36.50 is: 72.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.50 : 36.50 = 36.50 : x
  2. Step 2: Convert to fraction form
    18.50/36.50 = 36.50/x
  3. Step 3: Cross multiply
    18.50x = 36.50 × 36.50
  4. Step 4: Simplify right side
    18.50x = 1,332.25
  5. Step 5: Solve for x
    x = 1,332.25/18.50
  6. Step 6: Final answer
    x = 72.01

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.