Home / 3,918.92-5,408.19-2,150.53

Finding the Fourth Proportional to 3,918.92, 5,408.19 and 2,150.53

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Solution

The fourth proportional to 3,918.92, 5,408.19 and 2,150.53 is: 2,967.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.92 : 5,408.19 = 2,150.53 : x
  2. Step 2: Convert to fraction form
    3,918.92/5,408.19 = 2,150.53/x
  3. Step 3: Cross multiply
    3,918.92x = 5,408.19 × 2,150.53
  4. Step 4: Simplify right side
    3,918.92x = 11,630,461.32
  5. Step 5: Solve for x
    x = 11,630,461.32/3,918.92
  6. Step 6: Final answer
    x = 2,967.78

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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.