Home / 3,561.38-4,914.78-1,989.56

Finding the Fourth Proportional to 3,561.38, 4,914.78 and 1,989.56

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Solution

The fourth proportional to 3,561.38, 4,914.78 and 1,989.56 is: 2,745.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.38 : 4,914.78 = 1,989.56 : x
  2. Step 2: Convert to fraction form
    3,561.38/4,914.78 = 1,989.56/x
  3. Step 3: Cross multiply
    3,561.38x = 4,914.78 × 1,989.56
  4. Step 4: Simplify right side
    3,561.38x = 9,778,249.70
  5. Step 5: Solve for x
    x = 9,778,249.70/3,561.38
  6. Step 6: Final answer
    x = 2,745.64

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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.