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Finding the Third Proportional to 8,320 and 9,688

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Solution

The third proportional to 8,320 and 9,688 is: 11,280.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320 : 9,688 = 9,688 : x
  2. Step 2: Convert to fraction form
    8,320/9,688 = 9,688/x
  3. Step 3: Cross multiply
    8,320x = 9,688 × 9,688
  4. Step 4: Simplify right side
    8,320x = 93,857,344
  5. Step 5: Solve for x
    x = 93,857,344/8,320
  6. Step 6: Final answer
    x = 11,280.93

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Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.