Home / 3,561.56-4,914.50-1,989.72

Finding the Fourth Proportional to 3,561.56, 4,914.50 and 1,989.72

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Solution

The fourth proportional to 3,561.56, 4,914.50 and 1,989.72 is: 2,745.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.56 : 4,914.50 = 1,989.72 : x
  2. Step 2: Convert to fraction form
    3,561.56/4,914.50 = 1,989.72/x
  3. Step 3: Cross multiply
    3,561.56x = 4,914.50 × 1,989.72
  4. Step 4: Simplify right side
    3,561.56x = 9,778,478.94
  5. Step 5: Solve for x
    x = 9,778,478.94/3,561.56
  6. Step 6: Final answer
    x = 2,745.56

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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.