Home / 3,940.07-5,436.78-2,261.55

Finding the Fourth Proportional to 3,940.07, 5,436.78 and 2,261.55

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Solution

The fourth proportional to 3,940.07, 5,436.78 and 2,261.55 is: 3,120.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.07 : 5,436.78 = 2,261.55 : x
  2. Step 2: Convert to fraction form
    3,940.07/5,436.78 = 2,261.55/x
  3. Step 3: Cross multiply
    3,940.07x = 5,436.78 × 2,261.55
  4. Step 4: Simplify right side
    3,940.07x = 12,295,549.81
  5. Step 5: Solve for x
    x = 12,295,549.81/3,940.07
  6. Step 6: Final answer
    x = 3,120.65

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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.