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Finding the Third Proportional to 5,372 and 12,916

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Solution

The third proportional to 5,372 and 12,916 is: 31,054.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,372 : 12,916 = 12,916 : x
  2. Step 2: Convert to fraction form
    5,372/12,916 = 12,916/x
  3. Step 3: Cross multiply
    5,372x = 12,916 × 12,916
  4. Step 4: Simplify right side
    5,372x = 166,823,056
  5. Step 5: Solve for x
    x = 166,823,056/5,372
  6. Step 6: Final answer
    x = 31,054.18

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Why These Related Problems?

These problems maintain the same ratio (2.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.