Home / 5,428.96-8,144.28-1,919.43

Finding the Fourth Proportional to 5,428.96, 8,144.28 and 1,919.43

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Solution

The fourth proportional to 5,428.96, 8,144.28 and 1,919.43 is: 2,879.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.96 : 8,144.28 = 1,919.43 : x
  2. Step 2: Convert to fraction form
    5,428.96/8,144.28 = 1,919.43/x
  3. Step 3: Cross multiply
    5,428.96x = 8,144.28 × 1,919.43
  4. Step 4: Simplify right side
    5,428.96x = 15,632,375.36
  5. Step 5: Solve for x
    x = 15,632,375.36/5,428.96
  6. Step 6: Final answer
    x = 2,879.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.