Home / 5,078.87-7,620.12-3,689.85

Finding the Fourth Proportional to 5,078.87, 7,620.12 and 3,689.85

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Solution

The fourth proportional to 5,078.87, 7,620.12 and 3,689.85 is: 5,536.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.87 : 7,620.12 = 3,689.85 : x
  2. Step 2: Convert to fraction form
    5,078.87/7,620.12 = 3,689.85/x
  3. Step 3: Cross multiply
    5,078.87x = 7,620.12 × 3,689.85
  4. Step 4: Simplify right side
    5,078.87x = 28,117,099.78
  5. Step 5: Solve for x
    x = 28,117,099.78/5,078.87
  6. Step 6: Final answer
    x = 5,536.10

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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.