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Finding the Third Proportional to 13,431 and 18,880

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Solution

The third proportional to 13,431 and 18,880 is: 26,539.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431 : 18,880 = 18,880 : x
  2. Step 2: Convert to fraction form
    13,431/18,880 = 18,880/x
  3. Step 3: Cross multiply
    13,431x = 18,880 × 18,880
  4. Step 4: Simplify right side
    13,431x = 356,454,400
  5. Step 5: Solve for x
    x = 356,454,400/13,431
  6. Step 6: Final answer
    x = 26,539.68

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.