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Finding the Third Proportional to 3,607 and 8,729

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Solution

The third proportional to 3,607 and 8,729 is: 21,124.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,607 : 8,729 = 8,729 : x
  2. Step 2: Convert to fraction form
    3,607/8,729 = 8,729/x
  3. Step 3: Cross multiply
    3,607x = 8,729 × 8,729
  4. Step 4: Simplify right side
    3,607x = 76,195,441
  5. Step 5: Solve for x
    x = 76,195,441/3,607
  6. Step 6: Final answer
    x = 21,124.33

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.