Home / 3,913.44-5,400.37-2,145.12

Finding the Fourth Proportional to 3,913.44, 5,400.37 and 2,145.12

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Solution

The fourth proportional to 3,913.44, 5,400.37 and 2,145.12 is: 2,960.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.44 : 5,400.37 = 2,145.12 : x
  2. Step 2: Convert to fraction form
    3,913.44/5,400.37 = 2,145.12/x
  3. Step 3: Cross multiply
    3,913.44x = 5,400.37 × 2,145.12
  4. Step 4: Simplify right side
    3,913.44x = 11,584,403.97
  5. Step 5: Solve for x
    x = 11,584,403.97/3,913.44
  6. Step 6: Final answer
    x = 2,960.16

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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.