Home / 3,109.88-4,662.39-2,120.24

Finding the Fourth Proportional to 3,109.88, 4,662.39 and 2,120.24

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Solution

The fourth proportional to 3,109.88, 4,662.39 and 2,120.24 is: 3,178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.88 : 4,662.39 = 2,120.24 : x
  2. Step 2: Convert to fraction form
    3,109.88/4,662.39 = 2,120.24/x
  3. Step 3: Cross multiply
    3,109.88x = 4,662.39 × 2,120.24
  4. Step 4: Simplify right side
    3,109.88x = 9,885,380.34
  5. Step 5: Solve for x
    x = 9,885,380.34/3,109.88
  6. Step 6: Final answer
    x = 3,178.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.