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Finding the Fourth Proportional to 16,764.90, 25,163.55 and 10,203.90

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Solution

The fourth proportional to 16,764.90, 25,163.55 and 10,203.90 is: 15,315.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,764.90 : 25,163.55 = 10,203.90 : x
  2. Step 2: Convert to fraction form
    16,764.90/25,163.55 = 10,203.90/x
  3. Step 3: Cross multiply
    16,764.90x = 25,163.55 × 10,203.90
  4. Step 4: Simplify right side
    16,764.90x = 256,766,347.85
  5. Step 5: Solve for x
    x = 256,766,347.85/16,764.90
  6. Step 6: Final answer
    x = 15,315.71

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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.