Home / 5,428.92-8,143.38-1,324.92

Finding the Fourth Proportional to 5,428.92, 8,143.38 and 1,324.92

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Solution

The fourth proportional to 5,428.92, 8,143.38 and 1,324.92 is: 1,987.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.92 : 8,143.38 = 1,324.92 : x
  2. Step 2: Convert to fraction form
    5,428.92/8,143.38 = 1,324.92/x
  3. Step 3: Cross multiply
    5,428.92x = 8,143.38 × 1,324.92
  4. Step 4: Simplify right side
    5,428.92x = 10,789,327.03
  5. Step 5: Solve for x
    x = 10,789,327.03/5,428.92
  6. Step 6: Final answer
    x = 1,987.38

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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.