Home / 2,861.10-3,939.57-2,153.97

Finding the Fourth Proportional to 2,861.10, 3,939.57 and 2,153.97

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Solution

The fourth proportional to 2,861.10, 3,939.57 and 2,153.97 is: 2,965.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.10 : 3,939.57 = 2,153.97 : x
  2. Step 2: Convert to fraction form
    2,861.10/3,939.57 = 2,153.97/x
  3. Step 3: Cross multiply
    2,861.10x = 3,939.57 × 2,153.97
  4. Step 4: Simplify right side
    2,861.10x = 8,485,715.59
  5. Step 5: Solve for x
    x = 8,485,715.59/2,861.10
  6. Step 6: Final answer
    x = 2,965.89

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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.