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Finding the Fourth Proportional to 13,700.46, 20,550.69 and 3,312.21

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Solution

The fourth proportional to 13,700.46, 20,550.69 and 3,312.21 is: 4,968.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700.46 : 20,550.69 = 3,312.21 : x
  2. Step 2: Convert to fraction form
    13,700.46/20,550.69 = 3,312.21/x
  3. Step 3: Cross multiply
    13,700.46x = 20,550.69 × 3,312.21
  4. Step 4: Simplify right side
    13,700.46x = 68,068,200.92
  5. Step 5: Solve for x
    x = 68,068,200.92/13,700.46
  6. Step 6: Final answer
    x = 4,968.32

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.