Home / 3,121.60-4,305.36-1,942.24

Finding the Fourth Proportional to 3,121.60, 4,305.36 and 1,942.24

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Solution

The fourth proportional to 3,121.60, 4,305.36 and 1,942.24 is: 2,678.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.60 : 4,305.36 = 1,942.24 : x
  2. Step 2: Convert to fraction form
    3,121.60/4,305.36 = 1,942.24/x
  3. Step 3: Cross multiply
    3,121.60x = 4,305.36 × 1,942.24
  4. Step 4: Simplify right side
    3,121.60x = 8,362,042.41
  5. Step 5: Solve for x
    x = 8,362,042.41/3,121.60
  6. Step 6: Final answer
    x = 2,678.77

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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.