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Finding the Third Proportional to 3,688 and 7,874

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Solution

The third proportional to 3,688 and 7,874 is: 16,811.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688 : 7,874 = 7,874 : x
  2. Step 2: Convert to fraction form
    3,688/7,874 = 7,874/x
  3. Step 3: Cross multiply
    3,688x = 7,874 × 7,874
  4. Step 4: Simplify right side
    3,688x = 61,999,876
  5. Step 5: Solve for x
    x = 61,999,876/3,688
  6. Step 6: Final answer
    x = 16,811.25

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.