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Finding the Third Proportional to 11,128 and 18,080

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Solution

The third proportional to 11,128 and 18,080 is: 29,375.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128 : 18,080 = 18,080 : x
  2. Step 2: Convert to fraction form
    11,128/18,080 = 18,080/x
  3. Step 3: Cross multiply
    11,128x = 18,080 × 18,080
  4. Step 4: Simplify right side
    11,128x = 326,886,400
  5. Step 5: Solve for x
    x = 326,886,400/11,128
  6. Step 6: Final answer
    x = 29,375.13

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Why These Related Problems?

These problems maintain the same ratio (1.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.