Home / 3,121.77-4,313.75-2,969.91

Finding the Fourth Proportional to 3,121.77, 4,313.75 and 2,969.91

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Solution

The fourth proportional to 3,121.77, 4,313.75 and 2,969.91 is: 4,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.77 : 4,313.75 = 2,969.91 : x
  2. Step 2: Convert to fraction form
    3,121.77/4,313.75 = 2,969.91/x
  3. Step 3: Cross multiply
    3,121.77x = 4,313.75 × 2,969.91
  4. Step 4: Simplify right side
    3,121.77x = 12,811,434.41
  5. Step 5: Solve for x
    x = 12,811,434.41/3,121.77
  6. Step 6: Final answer
    x = 4,103.90

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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.