Home / 3,991.12-5,507.94-2,312.23

Finding the Fourth Proportional to 3,991.12, 5,507.94 and 2,312.23

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Solution

The fourth proportional to 3,991.12, 5,507.94 and 2,312.23 is: 3,190.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.12 : 5,507.94 = 2,312.23 : x
  2. Step 2: Convert to fraction form
    3,991.12/5,507.94 = 2,312.23/x
  3. Step 3: Cross multiply
    3,991.12x = 5,507.94 × 2,312.23
  4. Step 4: Simplify right side
    3,991.12x = 12,735,624.11
  5. Step 5: Solve for x
    x = 12,735,624.11/3,991.12
  6. Step 6: Final answer
    x = 3,190.99

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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.