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Finding the Third Proportional to 8,869 and 13,643

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Solution

The third proportional to 8,869 and 13,643 is: 20,986.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,869 : 13,643 = 13,643 : x
  2. Step 2: Convert to fraction form
    8,869/13,643 = 13,643/x
  3. Step 3: Cross multiply
    8,869x = 13,643 × 13,643
  4. Step 4: Simplify right side
    8,869x = 186,131,449
  5. Step 5: Solve for x
    x = 186,131,449/8,869
  6. Step 6: Final answer
    x = 20,986.75

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.