Home / 3,919.18-5,394.90-3,420.94

Finding the Fourth Proportional to 3,919.18, 5,394.90 and 3,420.94

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Solution

The fourth proportional to 3,919.18, 5,394.90 and 3,420.94 is: 4,709.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.18 : 5,394.90 = 3,420.94 : x
  2. Step 2: Convert to fraction form
    3,919.18/5,394.90 = 3,420.94/x
  3. Step 3: Cross multiply
    3,919.18x = 5,394.90 × 3,420.94
  4. Step 4: Simplify right side
    3,919.18x = 18,455,629.21
  5. Step 5: Solve for x
    x = 18,455,629.21/3,919.18
  6. Step 6: Final answer
    x = 4,709.05

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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.