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Finding the Third Proportional to 20,709.75 and 31,890.75

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Solution

The third proportional to 20,709.75 and 31,890.75 is: 49,108.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.75 : 31,890.75 = 31,890.75 : x
  2. Step 2: Convert to fraction form
    20,709.75/31,890.75 = 31,890.75/x
  3. Step 3: Cross multiply
    20,709.75x = 31,890.75 × 31,890.75
  4. Step 4: Simplify right side
    20,709.75x = 1,017,019,935.56
  5. Step 5: Solve for x
    x = 1,017,019,935.56/20,709.75
  6. Step 6: Final answer
    x = 49,108.27

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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.