Home / 3,515.92-5,280.12-3,139.60

Finding the Fourth Proportional to 3,515.92, 5,280.12 and 3,139.60

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Solution

The fourth proportional to 3,515.92, 5,280.12 and 3,139.60 is: 4,714.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,515.92 : 5,280.12 = 3,139.60 : x
  2. Step 2: Convert to fraction form
    3,515.92/5,280.12 = 3,139.60/x
  3. Step 3: Cross multiply
    3,515.92x = 5,280.12 × 3,139.60
  4. Step 4: Simplify right side
    3,515.92x = 16,577,464.75
  5. Step 5: Solve for x
    x = 16,577,464.75/3,515.92
  6. Step 6: Final answer
    x = 4,714.97

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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.