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Finding the Third Proportional to 20,961.75 and 31,157.75

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Solution

The third proportional to 20,961.75 and 31,157.75 is: 46,313.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.75 : 31,157.75 = 31,157.75 : x
  2. Step 2: Convert to fraction form
    20,961.75/31,157.75 = 31,157.75/x
  3. Step 3: Cross multiply
    20,961.75x = 31,157.75 × 31,157.75
  4. Step 4: Simplify right side
    20,961.75x = 970,805,385.06
  5. Step 5: Solve for x
    x = 970,805,385.06/20,961.75
  6. Step 6: Final answer
    x = 46,313.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.