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Finding the Third Proportional to 13,656 and 20,880

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Solution

The third proportional to 13,656 and 20,880 is: 31,925.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,656 : 20,880 = 20,880 : x
  2. Step 2: Convert to fraction form
    13,656/20,880 = 20,880/x
  3. Step 3: Cross multiply
    13,656x = 20,880 × 20,880
  4. Step 4: Simplify right side
    13,656x = 435,974,400
  5. Step 5: Solve for x
    x = 435,974,400/13,656
  6. Step 6: Final answer
    x = 31,925.48

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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.