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Finding the Third Proportional to 8,388 and 12,447

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Solution

The third proportional to 8,388 and 12,447 is: 18,470.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,388 : 12,447 = 12,447 : x
  2. Step 2: Convert to fraction form
    8,388/12,447 = 12,447/x
  3. Step 3: Cross multiply
    8,388x = 12,447 × 12,447
  4. Step 4: Simplify right side
    8,388x = 154,927,809
  5. Step 5: Solve for x
    x = 154,927,809/8,388
  6. Step 6: Final answer
    x = 18,470.17

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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.