Home / 3,115.40-4,299.72-1,936.85

Finding the Fourth Proportional to 3,115.40, 4,299.72 and 1,936.85

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Solution

The fourth proportional to 3,115.40, 4,299.72 and 1,936.85 is: 2,673.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.40 : 4,299.72 = 1,936.85 : x
  2. Step 2: Convert to fraction form
    3,115.40/4,299.72 = 1,936.85/x
  3. Step 3: Cross multiply
    3,115.40x = 4,299.72 × 1,936.85
  4. Step 4: Simplify right side
    3,115.40x = 8,327,883.92
  5. Step 5: Solve for x
    x = 8,327,883.92/3,115.40
  6. Step 6: Final answer
    x = 2,673.14

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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.