Home / 3,081.40-4,247.94-1,901.80

Finding the Fourth Proportional to 3,081.40, 4,247.94 and 1,901.80

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Solution

The fourth proportional to 3,081.40, 4,247.94 and 1,901.80 is: 2,621.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,081.40 : 4,247.94 = 1,901.80 : x
  2. Step 2: Convert to fraction form
    3,081.40/4,247.94 = 1,901.80/x
  3. Step 3: Cross multiply
    3,081.40x = 4,247.94 × 1,901.80
  4. Step 4: Simplify right side
    3,081.40x = 8,078,732.29
  5. Step 5: Solve for x
    x = 8,078,732.29/3,081.40
  6. Step 6: Final answer
    x = 2,621.77

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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.