Home / 3,921.01-5,410.99-2,128.48

Finding the Fourth Proportional to 3,921.01, 5,410.99 and 2,128.48

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Solution

The fourth proportional to 3,921.01, 5,410.99 and 2,128.48 is: 2,937.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.01 : 5,410.99 = 2,128.48 : x
  2. Step 2: Convert to fraction form
    3,921.01/5,410.99 = 2,128.48/x
  3. Step 3: Cross multiply
    3,921.01x = 5,410.99 × 2,128.48
  4. Step 4: Simplify right side
    3,921.01x = 11,517,203.57
  5. Step 5: Solve for x
    x = 11,517,203.57/3,921.01
  6. Step 6: Final answer
    x = 2,937.31

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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.