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Finding the Third Proportional to 13,713.75 and 20,720.25

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Solution

The third proportional to 13,713.75 and 20,720.25 is: 31,306.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,713.75 : 20,720.25 = 20,720.25 : x
  2. Step 2: Convert to fraction form
    13,713.75/20,720.25 = 20,720.25/x
  3. Step 3: Cross multiply
    13,713.75x = 20,720.25 × 20,720.25
  4. Step 4: Simplify right side
    13,713.75x = 429,328,760.06
  5. Step 5: Solve for x
    x = 429,328,760.06/13,713.75
  6. Step 6: Final answer
    x = 31,306.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.