Home / 8,112.36-12,169.26-2,919.72

Finding the Fourth Proportional to 8,112.36, 12,169.26 and 2,919.72

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Solution

The fourth proportional to 8,112.36, 12,169.26 and 2,919.72 is: 4,379.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.36 : 12,169.26 = 2,919.72 : x
  2. Step 2: Convert to fraction form
    8,112.36/12,169.26 = 2,919.72/x
  3. Step 3: Cross multiply
    8,112.36x = 12,169.26 × 2,919.72
  4. Step 4: Simplify right side
    8,112.36x = 35,530,831.81
  5. Step 5: Solve for x
    x = 35,530,831.81/8,112.36
  6. Step 6: Final answer
    x = 4,379.84

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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.