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Finding the Fourth Proportional to 13,450.70, 20,172.45 and 4,684.70

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Solution

The fourth proportional to 13,450.70, 20,172.45 and 4,684.70 is: 7,025.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,450.70 : 20,172.45 = 4,684.70 : x
  2. Step 2: Convert to fraction form
    13,450.70/20,172.45 = 4,684.70/x
  3. Step 3: Cross multiply
    13,450.70x = 20,172.45 × 4,684.70
  4. Step 4: Simplify right side
    13,450.70x = 94,501,876.52
  5. Step 5: Solve for x
    x = 94,501,876.52/13,450.70
  6. Step 6: Final answer
    x = 7,025.80

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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.