Home / 2,986.86-4,121.92-1,642.53

Finding the Fourth Proportional to 2,986.86, 4,121.92 and 1,642.53

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Solution

The fourth proportional to 2,986.86, 4,121.92 and 1,642.53 is: 2,266.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.86 : 4,121.92 = 1,642.53 : x
  2. Step 2: Convert to fraction form
    2,986.86/4,121.92 = 1,642.53/x
  3. Step 3: Cross multiply
    2,986.86x = 4,121.92 × 1,642.53
  4. Step 4: Simplify right side
    2,986.86x = 6,770,352.54
  5. Step 5: Solve for x
    x = 6,770,352.54/2,986.86
  6. Step 6: Final answer
    x = 2,266.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.