Home / 5,382.96-7,427.76-3,145.20

Finding the Fourth Proportional to 5,382.96, 7,427.76 and 3,145.20

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Solution

The fourth proportional to 5,382.96, 7,427.76 and 3,145.20 is: 4,339.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,382.96 : 7,427.76 = 3,145.20 : x
  2. Step 2: Convert to fraction form
    5,382.96/7,427.76 = 3,145.20/x
  3. Step 3: Cross multiply
    5,382.96x = 7,427.76 × 3,145.20
  4. Step 4: Simplify right side
    5,382.96x = 23,361,790.75
  5. Step 5: Solve for x
    x = 23,361,790.75/5,382.96
  6. Step 6: Final answer
    x = 4,339.95

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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.