Home / 3,989.70-5,505.64-2,221.27

Finding the Fourth Proportional to 3,989.70, 5,505.64 and 2,221.27

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Solution

The fourth proportional to 3,989.70, 5,505.64 and 2,221.27 is: 3,065.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.70 : 5,505.64 = 2,221.27 : x
  2. Step 2: Convert to fraction form
    3,989.70/5,505.64 = 2,221.27/x
  3. Step 3: Cross multiply
    3,989.70x = 5,505.64 × 2,221.27
  4. Step 4: Simplify right side
    3,989.70x = 12,229,512.96
  5. Step 5: Solve for x
    x = 12,229,512.96/3,989.70
  6. Step 6: Final answer
    x = 3,065.27

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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.