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Finding the Third Proportional to 20,722.50 and 31,869

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Solution

The third proportional to 20,722.50 and 31,869 is: 49,011.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.50 : 31,869 = 31,869 : x
  2. Step 2: Convert to fraction form
    20,722.50/31,869 = 31,869/x
  3. Step 3: Cross multiply
    20,722.50x = 31,869 × 31,869
  4. Step 4: Simplify right side
    20,722.50x = 1,015,633,161
  5. Step 5: Solve for x
    x = 1,015,633,161/20,722.50
  6. Step 6: Final answer
    x = 49,011.13

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.