Home / 3,918.87-5,408.15-2,150.55

Finding the Fourth Proportional to 3,918.87, 5,408.15 and 2,150.55

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Solution

The fourth proportional to 3,918.87, 5,408.15 and 2,150.55 is: 2,967.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.87 : 5,408.15 = 2,150.55 : x
  2. Step 2: Convert to fraction form
    3,918.87/5,408.15 = 2,150.55/x
  3. Step 3: Cross multiply
    3,918.87x = 5,408.15 × 2,150.55
  4. Step 4: Simplify right side
    3,918.87x = 11,630,486.23
  5. Step 5: Solve for x
    x = 11,630,486.23/3,918.87
  6. Step 6: Final answer
    x = 2,967.82

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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.