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Finding the Third Proportional to 8,420 and 12,468

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Solution

The third proportional to 8,420 and 12,468 is: 18,462.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420 : 12,468 = 12,468 : x
  2. Step 2: Convert to fraction form
    8,420/12,468 = 12,468/x
  3. Step 3: Cross multiply
    8,420x = 12,468 × 12,468
  4. Step 4: Simplify right side
    8,420x = 155,451,024
  5. Step 5: Solve for x
    x = 155,451,024/8,420
  6. Step 6: Final answer
    x = 18,462.12

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.