Home / 5,271.41-7,912.45-2,640.80

Finding the Fourth Proportional to 5,271.41, 7,912.45 and 2,640.80

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Solution

The fourth proportional to 5,271.41, 7,912.45 and 2,640.80 is: 3,963.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,271.41 : 7,912.45 = 2,640.80 : x
  2. Step 2: Convert to fraction form
    5,271.41/7,912.45 = 2,640.80/x
  3. Step 3: Cross multiply
    5,271.41x = 7,912.45 × 2,640.80
  4. Step 4: Simplify right side
    5,271.41x = 20,895,197.96
  5. Step 5: Solve for x
    x = 20,895,197.96/5,271.41
  6. Step 6: Final answer
    x = 3,963.87

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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.