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Finding the Third Proportional to 5,121.50 and 7,229

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Solution

The third proportional to 5,121.50 and 7,229 is: 10,203.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.50 : 7,229 = 7,229 : x
  2. Step 2: Convert to fraction form
    5,121.50/7,229 = 7,229/x
  3. Step 3: Cross multiply
    5,121.50x = 7,229 × 7,229
  4. Step 4: Simplify right side
    5,121.50x = 52,258,441
  5. Step 5: Solve for x
    x = 52,258,441/5,121.50
  6. Step 6: Final answer
    x = 10,203.74

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.