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Finding the Third Proportional to 11,376 and 15,480

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Solution

The third proportional to 11,376 and 15,480 is: 21,064.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,376 : 15,480 = 15,480 : x
  2. Step 2: Convert to fraction form
    11,376/15,480 = 15,480/x
  3. Step 3: Cross multiply
    11,376x = 15,480 × 15,480
  4. Step 4: Simplify right side
    11,376x = 239,630,400
  5. Step 5: Solve for x
    x = 239,630,400/11,376
  6. Step 6: Final answer
    x = 21,064.56

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.