Home / 3,920.64-5,410.56-2,152.42

Finding the Fourth Proportional to 3,920.64, 5,410.56 and 2,152.42

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Solution

The fourth proportional to 3,920.64, 5,410.56 and 2,152.42 is: 2,970.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.64 : 5,410.56 = 2,152.42 : x
  2. Step 2: Convert to fraction form
    3,920.64/5,410.56 = 2,152.42/x
  3. Step 3: Cross multiply
    3,920.64x = 5,410.56 × 2,152.42
  4. Step 4: Simplify right side
    3,920.64x = 11,645,797.56
  5. Step 5: Solve for x
    x = 11,645,797.56/3,920.64
  6. Step 6: Final answer
    x = 2,970.38

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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.