Home / 3,105.16-4,275.78-2,684.74

Finding the Fourth Proportional to 3,105.16, 4,275.78 and 2,684.74

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Solution

The fourth proportional to 3,105.16, 4,275.78 and 2,684.74 is: 3,696.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.16 : 4,275.78 = 2,684.74 : x
  2. Step 2: Convert to fraction form
    3,105.16/4,275.78 = 2,684.74/x
  3. Step 3: Cross multiply
    3,105.16x = 4,275.78 × 2,684.74
  4. Step 4: Simplify right side
    3,105.16x = 11,479,357.60
  5. Step 5: Solve for x
    x = 11,479,357.60/3,105.16
  6. Step 6: Final answer
    x = 3,696.87

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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.