Home / 3,990-5,986.23-2,043.57

Finding the Fourth Proportional to 3,990, 5,986.23 and 2,043.57

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Solution

The fourth proportional to 3,990, 5,986.23 and 2,043.57 is: 3,065.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990 : 5,986.23 = 2,043.57 : x
  2. Step 2: Convert to fraction form
    3,990/5,986.23 = 2,043.57/x
  3. Step 3: Cross multiply
    3,990x = 5,986.23 × 2,043.57
  4. Step 4: Simplify right side
    3,990x = 12,233,280.04
  5. Step 5: Solve for x
    x = 12,233,280.04/3,990
  6. Step 6: Final answer
    x = 3,065.98

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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.