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Finding the Third Proportional to 18.50 and 31.13

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Solution

The third proportional to 18.50 and 31.13 is: 52.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.50 : 31.13 = 31.13 : x
  2. Step 2: Convert to fraction form
    18.50/31.13 = 31.13/x
  3. Step 3: Cross multiply
    18.50x = 31.13 × 31.13
  4. Step 4: Simplify right side
    18.50x = 968.77
  5. Step 5: Solve for x
    x = 968.77/18.50
  6. Step 6: Final answer
    x = 52.37

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Why These Related Problems?

These problems maintain the same ratio (1.68) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.