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Finding the Third Proportional to 4,487 and 9,679

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Solution

The third proportional to 4,487 and 9,679 is: 20,878.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,487 : 9,679 = 9,679 : x
  2. Step 2: Convert to fraction form
    4,487/9,679 = 9,679/x
  3. Step 3: Cross multiply
    4,487x = 9,679 × 9,679
  4. Step 4: Simplify right side
    4,487x = 93,683,041
  5. Step 5: Solve for x
    x = 93,683,041/4,487
  6. Step 6: Final answer
    x = 20,878.77

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.