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Finding the Fourth Proportional to 13,328.99, 18,396.39 and 7,951.76

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Solution

The fourth proportional to 13,328.99, 18,396.39 and 7,951.76 is: 10,974.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,328.99 : 18,396.39 = 7,951.76 : x
  2. Step 2: Convert to fraction form
    13,328.99/18,396.39 = 7,951.76/x
  3. Step 3: Cross multiply
    13,328.99x = 18,396.39 × 7,951.76
  4. Step 4: Simplify right side
    13,328.99x = 146,283,678.15
  5. Step 5: Solve for x
    x = 146,283,678.15/13,328.99
  6. Step 6: Final answer
    x = 10,974.85

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.