Home / 3,921.43-5,408.74-2,485.30

Finding the Fourth Proportional to 3,921.43, 5,408.74 and 2,485.30

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Solution

The fourth proportional to 3,921.43, 5,408.74 and 2,485.30 is: 3,427.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.43 : 5,408.74 = 2,485.30 : x
  2. Step 2: Convert to fraction form
    3,921.43/5,408.74 = 2,485.30/x
  3. Step 3: Cross multiply
    3,921.43x = 5,408.74 × 2,485.30
  4. Step 4: Simplify right side
    3,921.43x = 13,442,341.52
  5. Step 5: Solve for x
    x = 13,442,341.52/3,921.43
  6. Step 6: Final answer
    x = 3,427.92

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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.