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Finding the Third Proportional to 5,286 and 8,688

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Solution

The third proportional to 5,286 and 8,688 is: 14,279.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286 : 8,688 = 8,688 : x
  2. Step 2: Convert to fraction form
    5,286/8,688 = 8,688/x
  3. Step 3: Cross multiply
    5,286x = 8,688 × 8,688
  4. Step 4: Simplify right side
    5,286x = 75,481,344
  5. Step 5: Solve for x
    x = 75,481,344/5,286
  6. Step 6: Final answer
    x = 14,279.48

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Why These Related Problems?

These problems maintain the same ratio (1.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.