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Finding the Third Proportional to 11,424 and 15,280

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Solution

The third proportional to 11,424 and 15,280 is: 20,437.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,424 : 15,280 = 15,280 : x
  2. Step 2: Convert to fraction form
    11,424/15,280 = 15,280/x
  3. Step 3: Cross multiply
    11,424x = 15,280 × 15,280
  4. Step 4: Simplify right side
    11,424x = 233,478,400
  5. Step 5: Solve for x
    x = 233,478,400/11,424
  6. Step 6: Final answer
    x = 20,437.54

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.