Home / 3,561.58-4,914.68-1,989.64

Finding the Fourth Proportional to 3,561.58, 4,914.68 and 1,989.64

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Solution

The fourth proportional to 3,561.58, 4,914.68 and 1,989.64 is: 2,745.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.58 : 4,914.68 = 1,989.64 : x
  2. Step 2: Convert to fraction form
    3,561.58/4,914.68 = 1,989.64/x
  3. Step 3: Cross multiply
    3,561.58x = 4,914.68 × 1,989.64
  4. Step 4: Simplify right side
    3,561.58x = 9,778,443.92
  5. Step 5: Solve for x
    x = 9,778,443.92/3,561.58
  6. Step 6: Final answer
    x = 2,745.54

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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.