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Finding the Third Proportional to 5,156 and 7,832

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Solution

The third proportional to 5,156 and 7,832 is: 11,896.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156 : 7,832 = 7,832 : x
  2. Step 2: Convert to fraction form
    5,156/7,832 = 7,832/x
  3. Step 3: Cross multiply
    5,156x = 7,832 × 7,832
  4. Step 4: Simplify right side
    5,156x = 61,340,224
  5. Step 5: Solve for x
    x = 61,340,224/5,156
  6. Step 6: Final answer
    x = 11,896.86

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.