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Finding the Third Proportional to 8,704 and 13,420

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Solution

The third proportional to 8,704 and 13,420 is: 20,691.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,704 : 13,420 = 13,420 : x
  2. Step 2: Convert to fraction form
    8,704/13,420 = 13,420/x
  3. Step 3: Cross multiply
    8,704x = 13,420 × 13,420
  4. Step 4: Simplify right side
    8,704x = 180,096,400
  5. Step 5: Solve for x
    x = 180,096,400/8,704
  6. Step 6: Final answer
    x = 20,691.22

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.