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Finding the Third Proportional to 13,705 and 20,560

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Solution

The third proportional to 13,705 and 20,560 is: 30,843.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,705 : 20,560 = 20,560 : x
  2. Step 2: Convert to fraction form
    13,705/20,560 = 20,560/x
  3. Step 3: Cross multiply
    13,705x = 20,560 × 20,560
  4. Step 4: Simplify right side
    13,705x = 422,713,600
  5. Step 5: Solve for x
    x = 422,713,600/13,705
  6. Step 6: Final answer
    x = 30,843.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.