Home / 2,757.78-4,136.67-1,939.71

Finding the Fourth Proportional to 2,757.78, 4,136.67 and 1,939.71

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Solution

The fourth proportional to 2,757.78, 4,136.67 and 1,939.71 is: 2,909.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,757.78 : 4,136.67 = 1,939.71 : x
  2. Step 2: Convert to fraction form
    2,757.78/4,136.67 = 1,939.71/x
  3. Step 3: Cross multiply
    2,757.78x = 4,136.67 × 1,939.71
  4. Step 4: Simplify right side
    2,757.78x = 8,023,955.68
  5. Step 5: Solve for x
    x = 8,023,955.68/2,757.78
  6. Step 6: Final answer
    x = 2,909.57

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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.