Home / 3,991.02-5,986.37-2,145.72

Finding the Fourth Proportional to 3,991.02, 5,986.37 and 2,145.72

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Solution

The fourth proportional to 3,991.02, 5,986.37 and 2,145.72 is: 3,218.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.02 : 5,986.37 = 2,145.72 : x
  2. Step 2: Convert to fraction form
    3,991.02/5,986.37 = 2,145.72/x
  3. Step 3: Cross multiply
    3,991.02x = 5,986.37 × 2,145.72
  4. Step 4: Simplify right side
    3,991.02x = 12,845,033.18
  5. Step 5: Solve for x
    x = 12,845,033.18/3,991.02
  6. Step 6: Final answer
    x = 3,218.49

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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.