Home / 3,924.80-5,410.40-2,875.20

Finding the Fourth Proportional to 3,924.80, 5,410.40 and 2,875.20

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Solution

The fourth proportional to 3,924.80, 5,410.40 and 2,875.20 is: 3,963.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924.80 : 5,410.40 = 2,875.20 : x
  2. Step 2: Convert to fraction form
    3,924.80/5,410.40 = 2,875.20/x
  3. Step 3: Cross multiply
    3,924.80x = 5,410.40 × 2,875.20
  4. Step 4: Simplify right side
    3,924.80x = 15,555,982.08
  5. Step 5: Solve for x
    x = 15,555,982.08/3,924.80
  6. Step 6: Final answer
    x = 3,963.51

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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.