Home / 3,211.86-4,433.85-2,151.39

Finding the Fourth Proportional to 3,211.86, 4,433.85 and 2,151.39

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Solution

The fourth proportional to 3,211.86, 4,433.85 and 2,151.39 is: 2,969.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.86 : 4,433.85 = 2,151.39 : x
  2. Step 2: Convert to fraction form
    3,211.86/4,433.85 = 2,151.39/x
  3. Step 3: Cross multiply
    3,211.86x = 4,433.85 × 2,151.39
  4. Step 4: Simplify right side
    3,211.86x = 9,538,940.55
  5. Step 5: Solve for x
    x = 9,538,940.55/3,211.86
  6. Step 6: Final answer
    x = 2,969.91

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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.