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Finding the Third Proportional to 7,120 and 9,376

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Solution

The third proportional to 7,120 and 9,376 is: 12,346.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120 : 9,376 = 9,376 : x
  2. Step 2: Convert to fraction form
    7,120/9,376 = 9,376/x
  3. Step 3: Cross multiply
    7,120x = 9,376 × 9,376
  4. Step 4: Simplify right side
    7,120x = 87,909,376
  5. Step 5: Solve for x
    x = 87,909,376/7,120
  6. Step 6: Final answer
    x = 12,346.82

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.