Home / 3,891.40-5,369.92-2,212.58

Finding the Fourth Proportional to 3,891.40, 5,369.92 and 2,212.58

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Solution

The fourth proportional to 3,891.40, 5,369.92 and 2,212.58 is: 3,053.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.40 : 5,369.92 = 2,212.58 : x
  2. Step 2: Convert to fraction form
    3,891.40/5,369.92 = 2,212.58/x
  3. Step 3: Cross multiply
    3,891.40x = 5,369.92 × 2,212.58
  4. Step 4: Simplify right side
    3,891.40x = 11,881,377.59
  5. Step 5: Solve for x
    x = 11,881,377.59/3,891.40
  6. Step 6: Final answer
    x = 3,053.24

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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.