Home / 3,889.80-5,367.78-2,211.17

Finding the Fourth Proportional to 3,889.80, 5,367.78 and 2,211.17

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Solution

The fourth proportional to 3,889.80, 5,367.78 and 2,211.17 is: 3,051.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.80 : 5,367.78 = 2,211.17 : x
  2. Step 2: Convert to fraction form
    3,889.80/5,367.78 = 2,211.17/x
  3. Step 3: Cross multiply
    3,889.80x = 5,367.78 × 2,211.17
  4. Step 4: Simplify right side
    3,889.80x = 11,869,074.10
  5. Step 5: Solve for x
    x = 11,869,074.10/3,889.80
  6. Step 6: Final answer
    x = 3,051.33

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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.