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Finding the Fourth Proportional to 18,964.80, 26,163.03 and 11,406.75

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Solution

The fourth proportional to 18,964.80, 26,163.03 and 11,406.75 is: 15,736.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,964.80 : 26,163.03 = 11,406.75 : x
  2. Step 2: Convert to fraction form
    18,964.80/26,163.03 = 11,406.75/x
  3. Step 3: Cross multiply
    18,964.80x = 26,163.03 × 11,406.75
  4. Step 4: Simplify right side
    18,964.80x = 298,435,142.45
  5. Step 5: Solve for x
    x = 298,435,142.45/18,964.80
  6. Step 6: Final answer
    x = 15,736.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.