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Finding the Third Proportional to 13,720 and 20,935

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Solution

The third proportional to 13,720 and 20,935 is: 31,944.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720 : 20,935 = 20,935 : x
  2. Step 2: Convert to fraction form
    13,720/20,935 = 20,935/x
  3. Step 3: Cross multiply
    13,720x = 20,935 × 20,935
  4. Step 4: Simplify right side
    13,720x = 438,274,225
  5. Step 5: Solve for x
    x = 438,274,225/13,720
  6. Step 6: Final answer
    x = 31,944.19

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.