Home / 3,991.88-5,508.80-2,313.61

Finding the Fourth Proportional to 3,991.88, 5,508.80 and 2,313.61

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Solution

The fourth proportional to 3,991.88, 5,508.80 and 2,313.61 is: 3,192.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.88 : 5,508.80 = 2,313.61 : x
  2. Step 2: Convert to fraction form
    3,991.88/5,508.80 = 2,313.61/x
  3. Step 3: Cross multiply
    3,991.88x = 5,508.80 × 2,313.61
  4. Step 4: Simplify right side
    3,991.88x = 12,745,214.77
  5. Step 5: Solve for x
    x = 12,745,214.77/3,991.88
  6. Step 6: Final answer
    x = 3,192.79

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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.