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Finding the Third Proportional to 15,391.50 and 33,213

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Solution

The third proportional to 15,391.50 and 33,213 is: 71,669.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.50 : 33,213 = 33,213 : x
  2. Step 2: Convert to fraction form
    15,391.50/33,213 = 33,213/x
  3. Step 3: Cross multiply
    15,391.50x = 33,213 × 33,213
  4. Step 4: Simplify right side
    15,391.50x = 1,103,103,369
  5. Step 5: Solve for x
    x = 1,103,103,369/15,391.50
  6. Step 6: Final answer
    x = 71,669.65

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.