Home / 3,996.70-5,515.50-2,318.20

Finding the Fourth Proportional to 3,996.70, 5,515.50 and 2,318.20

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Solution

The fourth proportional to 3,996.70, 5,515.50 and 2,318.20 is: 3,199.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,996.70 : 5,515.50 = 2,318.20 : x
  2. Step 2: Convert to fraction form
    3,996.70/5,515.50 = 2,318.20/x
  3. Step 3: Cross multiply
    3,996.70x = 5,515.50 × 2,318.20
  4. Step 4: Simplify right side
    3,996.70x = 12,786,032.10
  5. Step 5: Solve for x
    x = 12,786,032.10/3,996.70
  6. Step 6: Final answer
    x = 3,199.15

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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.