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Finding the Third Proportional to 3,191 and 6,643

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Solution

The third proportional to 3,191 and 6,643 is: 13,829.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191 : 6,643 = 6,643 : x
  2. Step 2: Convert to fraction form
    3,191/6,643 = 6,643/x
  3. Step 3: Cross multiply
    3,191x = 6,643 × 6,643
  4. Step 4: Simplify right side
    3,191x = 44,129,449
  5. Step 5: Solve for x
    x = 44,129,449/3,191
  6. Step 6: Final answer
    x = 13,829.35

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.