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Finding the Third Proportional to 6,920 and 15,128

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Solution

The third proportional to 6,920 and 15,128 is: 33,071.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920 : 15,128 = 15,128 : x
  2. Step 2: Convert to fraction form
    6,920/15,128 = 15,128/x
  3. Step 3: Cross multiply
    6,920x = 15,128 × 15,128
  4. Step 4: Simplify right side
    6,920x = 228,856,384
  5. Step 5: Solve for x
    x = 228,856,384/6,920
  6. Step 6: Final answer
    x = 33,071.73

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.