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Finding the Third Proportional to 4,000 and 7,168

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Solution

The third proportional to 4,000 and 7,168 is: 12,845.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,000 : 7,168 = 7,168 : x
  2. Step 2: Convert to fraction form
    4,000/7,168 = 7,168/x
  3. Step 3: Cross multiply
    4,000x = 7,168 × 7,168
  4. Step 4: Simplify right side
    4,000x = 51,380,224
  5. Step 5: Solve for x
    x = 51,380,224/4,000
  6. Step 6: Final answer
    x = 12,845.06

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.