Home / 3,918.89-5,408.20-2,150.60

Finding the Fourth Proportional to 3,918.89, 5,408.20 and 2,150.60

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Solution

The fourth proportional to 3,918.89, 5,408.20 and 2,150.60 is: 2,967.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.89 : 5,408.20 = 2,150.60 : x
  2. Step 2: Convert to fraction form
    3,918.89/5,408.20 = 2,150.60/x
  3. Step 3: Cross multiply
    3,918.89x = 5,408.20 × 2,150.60
  4. Step 4: Simplify right side
    3,918.89x = 11,630,850.57
  5. Step 5: Solve for x
    x = 11,630,850.57/3,918.89
  6. Step 6: Final answer
    x = 2,967.89

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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.