Home / 3,991.68-5,987.88-1,359.36

Finding the Fourth Proportional to 3,991.68, 5,987.88 and 1,359.36

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Solution

The fourth proportional to 3,991.68, 5,987.88 and 1,359.36 is: 2,039.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.68 : 5,987.88 = 1,359.36 : x
  2. Step 2: Convert to fraction form
    3,991.68/5,987.88 = 1,359.36/x
  3. Step 3: Cross multiply
    3,991.68x = 5,987.88 × 1,359.36
  4. Step 4: Simplify right side
    3,991.68x = 8,139,684.56
  5. Step 5: Solve for x
    x = 8,139,684.56/3,991.68
  6. Step 6: Final answer
    x = 2,039.16

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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.