Home / 5,428.42-8,143.62-1,919.44

Finding the Fourth Proportional to 5,428.42, 8,143.62 and 1,919.44

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Solution

The fourth proportional to 5,428.42, 8,143.62 and 1,919.44 is: 2,879.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.42 : 8,143.62 = 1,919.44 : x
  2. Step 2: Convert to fraction form
    5,428.42/8,143.62 = 1,919.44/x
  3. Step 3: Cross multiply
    5,428.42x = 8,143.62 × 1,919.44
  4. Step 4: Simplify right side
    5,428.42x = 15,631,189.97
  5. Step 5: Solve for x
    x = 15,631,189.97/5,428.42
  6. Step 6: Final answer
    x = 2,879.51

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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.