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Finding the Third Proportional to 11,378 and 15,663

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Solution

The third proportional to 11,378 and 15,663 is: 21,561.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,378 : 15,663 = 15,663 : x
  2. Step 2: Convert to fraction form
    11,378/15,663 = 15,663/x
  3. Step 3: Cross multiply
    11,378x = 15,663 × 15,663
  4. Step 4: Simplify right side
    11,378x = 245,329,569
  5. Step 5: Solve for x
    x = 245,329,569/11,378
  6. Step 6: Final answer
    x = 21,561.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.