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Finding the Third Proportional to 13,239.50 and 19,551

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Solution

The third proportional to 13,239.50 and 19,551 is: 28,871.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.50 : 19,551 = 19,551 : x
  2. Step 2: Convert to fraction form
    13,239.50/19,551 = 19,551/x
  3. Step 3: Cross multiply
    13,239.50x = 19,551 × 19,551
  4. Step 4: Simplify right side
    13,239.50x = 382,241,601
  5. Step 5: Solve for x
    x = 382,241,601/13,239.50
  6. Step 6: Final answer
    x = 28,871.30

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.