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Finding the Fourth Proportional to 13,196.66, 18,211.83 and 7,228.67

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Solution

The fourth proportional to 13,196.66, 18,211.83 and 7,228.67 is: 9,975.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,196.66 : 18,211.83 = 7,228.67 : x
  2. Step 2: Convert to fraction form
    13,196.66/18,211.83 = 7,228.67/x
  3. Step 3: Cross multiply
    13,196.66x = 18,211.83 × 7,228.67
  4. Step 4: Simplify right side
    13,196.66x = 131,647,309.17
  5. Step 5: Solve for x
    x = 131,647,309.17/13,196.66
  6. Step 6: Final answer
    x = 9,975.81

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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.