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Finding the Third Proportional to 8,664 and 12,216

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Solution

The third proportional to 8,664 and 12,216 is: 17,224.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664 : 12,216 = 12,216 : x
  2. Step 2: Convert to fraction form
    8,664/12,216 = 12,216/x
  3. Step 3: Cross multiply
    8,664x = 12,216 × 12,216
  4. Step 4: Simplify right side
    8,664x = 149,230,656
  5. Step 5: Solve for x
    x = 149,230,656/8,664
  6. Step 6: Final answer
    x = 17,224.22

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.