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Finding the Third Proportional to 6,915 and 8,671.50

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Solution

The third proportional to 6,915 and 8,671.50 is: 10,874.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,915 : 8,671.50 = 8,671.50 : x
  2. Step 2: Convert to fraction form
    6,915/8,671.50 = 8,671.50/x
  3. Step 3: Cross multiply
    6,915x = 8,671.50 × 8,671.50
  4. Step 4: Simplify right side
    6,915x = 75,194,912.25
  5. Step 5: Solve for x
    x = 75,194,912.25/6,915
  6. Step 6: Final answer
    x = 10,874.17

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Why These Related Problems?

These problems maintain the same ratio (1.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.