Home / 3,920.86-5,880.12-2,070.98

Finding the Fourth Proportional to 3,920.86, 5,880.12 and 2,070.98

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Solution

The fourth proportional to 3,920.86, 5,880.12 and 2,070.98 is: 3,105.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.86 : 5,880.12 = 2,070.98 : x
  2. Step 2: Convert to fraction form
    3,920.86/5,880.12 = 2,070.98/x
  3. Step 3: Cross multiply
    3,920.86x = 5,880.12 × 2,070.98
  4. Step 4: Simplify right side
    3,920.86x = 12,177,610.92
  5. Step 5: Solve for x
    x = 12,177,610.92/3,920.86
  6. Step 6: Final answer
    x = 3,105.85

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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.