Home / 5,180.46-7,149.42-2,912.07

Finding the Fourth Proportional to 5,180.46, 7,149.42 and 2,912.07

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Solution

The fourth proportional to 5,180.46, 7,149.42 and 2,912.07 is: 4,018.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,180.46 : 7,149.42 = 2,912.07 : x
  2. Step 2: Convert to fraction form
    5,180.46/7,149.42 = 2,912.07/x
  3. Step 3: Cross multiply
    5,180.46x = 7,149.42 × 2,912.07
  4. Step 4: Simplify right side
    5,180.46x = 20,819,611.50
  5. Step 5: Solve for x
    x = 20,819,611.50/5,180.46
  6. Step 6: Final answer
    x = 4,018.87

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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.