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Finding the Fourth Proportional to 13,325.67, 19,991.81 and 3,965.65

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Solution

The fourth proportional to 13,325.67, 19,991.81 and 3,965.65 is: 5,949.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,325.67 : 19,991.81 = 3,965.65 : x
  2. Step 2: Convert to fraction form
    13,325.67/19,991.81 = 3,965.65/x
  3. Step 3: Cross multiply
    13,325.67x = 19,991.81 × 3,965.65
  4. Step 4: Simplify right side
    13,325.67x = 79,280,481.26
  5. Step 5: Solve for x
    x = 79,280,481.26/13,325.67
  6. Step 6: Final answer
    x = 5,949.46

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Why These Related Problems?

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