Home / 3,123.36-4,309.20-2,179.44

Finding the Fourth Proportional to 3,123.36, 4,309.20 and 2,179.44

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Solution

The fourth proportional to 3,123.36, 4,309.20 and 2,179.44 is: 3,006.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.36 : 4,309.20 = 2,179.44 : x
  2. Step 2: Convert to fraction form
    3,123.36/4,309.20 = 2,179.44/x
  3. Step 3: Cross multiply
    3,123.36x = 4,309.20 × 2,179.44
  4. Step 4: Simplify right side
    3,123.36x = 9,391,642.85
  5. Step 5: Solve for x
    x = 9,391,642.85/3,123.36
  6. Step 6: Final answer
    x = 3,006.90

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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.