Home / 3,186.54-4,395.60-3,121.20

Finding the Fourth Proportional to 3,186.54, 4,395.60 and 3,121.20

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Solution

The fourth proportional to 3,186.54, 4,395.60 and 3,121.20 is: 4,305.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.54 : 4,395.60 = 3,121.20 : x
  2. Step 2: Convert to fraction form
    3,186.54/4,395.60 = 3,121.20/x
  3. Step 3: Cross multiply
    3,186.54x = 4,395.60 × 3,121.20
  4. Step 4: Simplify right side
    3,186.54x = 13,719,546.72
  5. Step 5: Solve for x
    x = 13,719,546.72/3,186.54
  6. Step 6: Final answer
    x = 4,305.47

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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.