Home / 3,169.15-4,372.72-1,989.79

Finding the Fourth Proportional to 3,169.15, 4,372.72 and 1,989.79

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Solution

The fourth proportional to 3,169.15, 4,372.72 and 1,989.79 is: 2,745.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,169.15 : 4,372.72 = 1,989.79 : x
  2. Step 2: Convert to fraction form
    3,169.15/4,372.72 = 1,989.79/x
  3. Step 3: Cross multiply
    3,169.15x = 4,372.72 × 1,989.79
  4. Step 4: Simplify right side
    3,169.15x = 8,700,794.53
  5. Step 5: Solve for x
    x = 8,700,794.53/3,169.15
  6. Step 6: Final answer
    x = 2,745.47

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1.5x scale

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.