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Finding the Third Proportional to 3,879 and 8,618

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Solution

The third proportional to 3,879 and 8,618 is: 19,146.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879 : 8,618 = 8,618 : x
  2. Step 2: Convert to fraction form
    3,879/8,618 = 8,618/x
  3. Step 3: Cross multiply
    3,879x = 8,618 × 8,618
  4. Step 4: Simplify right side
    3,879x = 74,269,924
  5. Step 5: Solve for x
    x = 74,269,924/3,879
  6. Step 6: Final answer
    x = 19,146.67

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.