Home / 3,121.86-4,684.52-1,272.83

Finding the Fourth Proportional to 3,121.86, 4,684.52 and 1,272.83

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Solution

The fourth proportional to 3,121.86, 4,684.52 and 1,272.83 is: 1,909.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.86 : 4,684.52 = 1,272.83 : x
  2. Step 2: Convert to fraction form
    3,121.86/4,684.52 = 1,272.83/x
  3. Step 3: Cross multiply
    3,121.86x = 4,684.52 × 1,272.83
  4. Step 4: Simplify right side
    3,121.86x = 5,962,612.48
  5. Step 5: Solve for x
    x = 5,962,612.48/3,121.86
  6. Step 6: Final answer
    x = 1,909.95

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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.