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Finding the Third Proportional to 7,320 and 9,387

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Solution

The third proportional to 7,320 and 9,387 is: 12,037.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,320 : 9,387 = 9,387 : x
  2. Step 2: Convert to fraction form
    7,320/9,387 = 9,387/x
  3. Step 3: Cross multiply
    7,320x = 9,387 × 9,387
  4. Step 4: Simplify right side
    7,320x = 88,115,769
  5. Step 5: Solve for x
    x = 88,115,769/7,320
  6. Step 6: Final answer
    x = 12,037.67

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.