Home / 3,891.55-5,370.31-2,212.95

Finding the Fourth Proportional to 3,891.55, 5,370.31 and 2,212.95

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Solution

The fourth proportional to 3,891.55, 5,370.31 and 2,212.95 is: 3,053.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.55 : 5,370.31 = 2,212.95 : x
  2. Step 2: Convert to fraction form
    3,891.55/5,370.31 = 2,212.95/x
  3. Step 3: Cross multiply
    3,891.55x = 5,370.31 × 2,212.95
  4. Step 4: Simplify right side
    3,891.55x = 11,884,216.45
  5. Step 5: Solve for x
    x = 11,884,216.45/3,891.55
  6. Step 6: Final answer
    x = 3,053.86

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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.