Home / 3,979.21-5,971.86-2,006.81

Finding the Fourth Proportional to 3,979.21, 5,971.86 and 2,006.81

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Solution

The fourth proportional to 3,979.21, 5,971.86 and 2,006.81 is: 3,011.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.21 : 5,971.86 = 2,006.81 : x
  2. Step 2: Convert to fraction form
    3,979.21/5,971.86 = 2,006.81/x
  3. Step 3: Cross multiply
    3,979.21x = 5,971.86 × 2,006.81
  4. Step 4: Simplify right side
    3,979.21x = 11,984,388.37
  5. Step 5: Solve for x
    x = 11,984,388.37/3,979.21
  6. Step 6: Final answer
    x = 3,011.75

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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.