Home / 13,939.70-20,912.56-4,078.22

Finding the Fourth Proportional to 13,939.70, 20,912.56 and 4,078.22

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Solution

The fourth proportional to 13,939.70, 20,912.56 and 4,078.22 is: 6,118.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.70 : 20,912.56 = 4,078.22 : x
  2. Step 2: Convert to fraction form
    13,939.70/20,912.56 = 4,078.22/x
  3. Step 3: Cross multiply
    13,939.70x = 20,912.56 × 4,078.22
  4. Step 4: Simplify right side
    13,939.70x = 85,286,020.44
  5. Step 5: Solve for x
    x = 85,286,020.44/13,939.70
  6. Step 6: Final answer
    x = 6,118.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.