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Finding the Third Proportional to 2,916 and 6,318

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Solution

The third proportional to 2,916 and 6,318 is: 13,689

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,916 : 6,318 = 6,318 : x
  2. Step 2: Convert to fraction form
    2,916/6,318 = 6,318/x
  3. Step 3: Cross multiply
    2,916x = 6,318 × 6,318
  4. Step 4: Simplify right side
    2,916x = 39,917,124
  5. Step 5: Solve for x
    x = 39,917,124/2,916
  6. Step 6: Final answer
    x = 13,689

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.