Home / 3,891.52-5,369.38-2,212.80

Finding the Fourth Proportional to 3,891.52, 5,369.38 and 2,212.80

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Solution

The fourth proportional to 3,891.52, 5,369.38 and 2,212.80 is: 3,053.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.52 : 5,369.38 = 2,212.80 : x
  2. Step 2: Convert to fraction form
    3,891.52/5,369.38 = 2,212.80/x
  3. Step 3: Cross multiply
    3,891.52x = 5,369.38 × 2,212.80
  4. Step 4: Simplify right side
    3,891.52x = 11,881,364.06
  5. Step 5: Solve for x
    x = 11,881,364.06/3,891.52
  6. Step 6: Final answer
    x = 3,053.14

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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.