Home / 3,099.75-4,274.21-1,980.74

Finding the Fourth Proportional to 3,099.75, 4,274.21 and 1,980.74

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Solution

The fourth proportional to 3,099.75, 4,274.21 and 1,980.74 is: 2,731.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,099.75 : 4,274.21 = 1,980.74 : x
  2. Step 2: Convert to fraction form
    3,099.75/4,274.21 = 1,980.74/x
  3. Step 3: Cross multiply
    3,099.75x = 4,274.21 × 1,980.74
  4. Step 4: Simplify right side
    3,099.75x = 8,466,067.44
  5. Step 5: Solve for x
    x = 8,466,067.44/3,099.75
  6. Step 6: Final answer
    x = 2,731.21

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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.