Home / 7,940.28-11,915.22-2,749.80

Finding the Fourth Proportional to 7,940.28, 11,915.22 and 2,749.80

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Solution

The fourth proportional to 7,940.28, 11,915.22 and 2,749.80 is: 4,126.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,940.28 : 11,915.22 = 2,749.80 : x
  2. Step 2: Convert to fraction form
    7,940.28/11,915.22 = 2,749.80/x
  3. Step 3: Cross multiply
    7,940.28x = 11,915.22 × 2,749.80
  4. Step 4: Simplify right side
    7,940.28x = 32,764,471.96
  5. Step 5: Solve for x
    x = 32,764,471.96/7,940.28
  6. Step 6: Final answer
    x = 4,126.36

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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.