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Finding the Third Proportional to 20,015.50 and 30,995

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Solution

The third proportional to 20,015.50 and 30,995 is: 47,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,015.50 : 30,995 = 30,995 : x
  2. Step 2: Convert to fraction form
    20,015.50/30,995 = 30,995/x
  3. Step 3: Cross multiply
    20,015.50x = 30,995 × 30,995
  4. Step 4: Simplify right side
    20,015.50x = 960,690,025
  5. Step 5: Solve for x
    x = 960,690,025/20,015.50
  6. Step 6: Final answer
    x = 47,997.30

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.