Home / 2,785.80-4,178.94-2,101.56

Finding the Fourth Proportional to 2,785.80, 4,178.94 and 2,101.56

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Solution

The fourth proportional to 2,785.80, 4,178.94 and 2,101.56 is: 3,152.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.80 : 4,178.94 = 2,101.56 : x
  2. Step 2: Convert to fraction form
    2,785.80/4,178.94 = 2,101.56/x
  3. Step 3: Cross multiply
    2,785.80x = 4,178.94 × 2,101.56
  4. Step 4: Simplify right side
    2,785.80x = 8,782,293.15
  5. Step 5: Solve for x
    x = 8,782,293.15/2,785.80
  6. Step 6: Final answer
    x = 3,152.52

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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.