Home / 3,939.65-5,436.83-2,261.36

Finding the Fourth Proportional to 3,939.65, 5,436.83 and 2,261.36

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Solution

The fourth proportional to 3,939.65, 5,436.83 and 2,261.36 is: 3,120.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.65 : 5,436.83 = 2,261.36 : x
  2. Step 2: Convert to fraction form
    3,939.65/5,436.83 = 2,261.36/x
  3. Step 3: Cross multiply
    3,939.65x = 5,436.83 × 2,261.36
  4. Step 4: Simplify right side
    3,939.65x = 12,294,629.89
  5. Step 5: Solve for x
    x = 12,294,629.89/3,939.65
  6. Step 6: Final answer
    x = 3,120.74

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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.