Home / 3,891.39-5,370.22-2,212.74

Finding the Fourth Proportional to 3,891.39, 5,370.22 and 2,212.74

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Solution

The fourth proportional to 3,891.39, 5,370.22 and 2,212.74 is: 3,053.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.39 : 5,370.22 = 2,212.74 : x
  2. Step 2: Convert to fraction form
    3,891.39/5,370.22 = 2,212.74/x
  3. Step 3: Cross multiply
    3,891.39x = 5,370.22 × 2,212.74
  4. Step 4: Simplify right side
    3,891.39x = 11,882,895.07
  5. Step 5: Solve for x
    x = 11,882,895.07/3,891.39
  6. Step 6: Final answer
    x = 3,053.64

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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.