Home / 3,990.96-5,508.24-2,312.12

Finding the Fourth Proportional to 3,990.96, 5,508.24 and 2,312.12

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Solution

The fourth proportional to 3,990.96, 5,508.24 and 2,312.12 is: 3,191.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.96 : 5,508.24 = 2,312.12 : x
  2. Step 2: Convert to fraction form
    3,990.96/5,508.24 = 2,312.12/x
  3. Step 3: Cross multiply
    3,990.96x = 5,508.24 × 2,312.12
  4. Step 4: Simplify right side
    3,990.96x = 12,735,711.87
  5. Step 5: Solve for x
    x = 12,735,711.87/3,990.96
  6. Step 6: Final answer
    x = 3,191.14

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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.