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Finding the Third Proportional to 8,388 and 12,336

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Solution

The third proportional to 8,388 and 12,336 is: 18,142.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,388 : 12,336 = 12,336 : x
  2. Step 2: Convert to fraction form
    8,388/12,336 = 12,336/x
  3. Step 3: Cross multiply
    8,388x = 12,336 × 12,336
  4. Step 4: Simplify right side
    8,388x = 152,176,896
  5. Step 5: Solve for x
    x = 152,176,896/8,388
  6. Step 6: Final answer
    x = 18,142.21

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.