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Finding the Fourth Proportional to 28,163.87, 38,863.50 and 16,831.11

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Solution

The fourth proportional to 28,163.87, 38,863.50 and 16,831.11 is: 23,225.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163.87 : 38,863.50 = 16,831.11 : x
  2. Step 2: Convert to fraction form
    28,163.87/38,863.50 = 16,831.11/x
  3. Step 3: Cross multiply
    28,163.87x = 38,863.50 × 16,831.11
  4. Step 4: Simplify right side
    28,163.87x = 654,115,843.49
  5. Step 5: Solve for x
    x = 654,115,843.49/28,163.87
  6. Step 6: Final answer
    x = 23,225.36

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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.