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Finding the Fourth Proportional to 13,632.12, 18,812.52 and 8,043.12

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Solution

The fourth proportional to 13,632.12, 18,812.52 and 8,043.12 is: 11,099.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,632.12 : 18,812.52 = 8,043.12 : x
  2. Step 2: Convert to fraction form
    13,632.12/18,812.52 = 8,043.12/x
  3. Step 3: Cross multiply
    13,632.12x = 18,812.52 × 8,043.12
  4. Step 4: Simplify right side
    13,632.12x = 151,311,355.86
  5. Step 5: Solve for x
    x = 151,311,355.86/13,632.12
  6. Step 6: Final answer
    x = 11,099.62

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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.