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Finding the Fourth Proportional to 13,919.06, 20,879.81 and 3,530.81

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Solution

The fourth proportional to 13,919.06, 20,879.81 and 3,530.81 is: 5,296.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.06 : 20,879.81 = 3,530.81 : x
  2. Step 2: Convert to fraction form
    13,919.06/20,879.81 = 3,530.81/x
  3. Step 3: Cross multiply
    13,919.06x = 20,879.81 × 3,530.81
  4. Step 4: Simplify right side
    13,919.06x = 73,722,689.73
  5. Step 5: Solve for x
    x = 73,722,689.73/13,919.06
  6. Step 6: Final answer
    x = 5,296.53

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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.