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Finding the Fourth Proportional to 8,551.99, 12,831.95 and 3,622.78

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Solution

The fourth proportional to 8,551.99, 12,831.95 and 3,622.78 is: 5,435.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,551.99 : 12,831.95 = 3,622.78 : x
  2. Step 2: Convert to fraction form
    8,551.99/12,831.95 = 3,622.78/x
  3. Step 3: Cross multiply
    8,551.99x = 12,831.95 × 3,622.78
  4. Step 4: Simplify right side
    8,551.99x = 46,487,331.82
  5. Step 5: Solve for x
    x = 46,487,331.82/8,551.99
  6. Step 6: Final answer
    x = 5,435.85

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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.