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Finding the Fourth Proportional to 13,576.98, 20,351.52 and 7,721.22

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Solution

The fourth proportional to 13,576.98, 20,351.52 and 7,721.22 is: 11,573.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,576.98 : 20,351.52 = 7,721.22 : x
  2. Step 2: Convert to fraction form
    13,576.98/20,351.52 = 7,721.22/x
  3. Step 3: Cross multiply
    13,576.98x = 20,351.52 × 7,721.22
  4. Step 4: Simplify right side
    13,576.98x = 157,138,563.25
  5. Step 5: Solve for x
    x = 157,138,563.25/13,576.98
  6. Step 6: Final answer
    x = 11,573.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.