Home / 3,991.74-5,508.18-2,312.88

Finding the Fourth Proportional to 3,991.74, 5,508.18 and 2,312.88

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Solution

The fourth proportional to 3,991.74, 5,508.18 and 2,312.88 is: 3,191.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.74 : 5,508.18 = 2,312.88 : x
  2. Step 2: Convert to fraction form
    3,991.74/5,508.18 = 2,312.88/x
  3. Step 3: Cross multiply
    3,991.74x = 5,508.18 × 2,312.88
  4. Step 4: Simplify right side
    3,991.74x = 12,739,759.36
  5. Step 5: Solve for x
    x = 12,739,759.36/3,991.74
  6. Step 6: Final answer
    x = 3,191.53

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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.