Home / 3,889.81-5,366.35-2,209.85

Finding the Fourth Proportional to 3,889.81, 5,366.35 and 2,209.85

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Solution

The fourth proportional to 3,889.81, 5,366.35 and 2,209.85 is: 3,048.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.81 : 5,366.35 = 2,209.85 : x
  2. Step 2: Convert to fraction form
    3,889.81/5,366.35 = 2,209.85/x
  3. Step 3: Cross multiply
    3,889.81x = 5,366.35 × 2,209.85
  4. Step 4: Simplify right side
    3,889.81x = 11,858,828.55
  5. Step 5: Solve for x
    x = 11,858,828.55/3,889.81
  6. Step 6: Final answer
    x = 3,048.69

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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.