Home / 3,910.92-5,397.08-2,142.64

Finding the Fourth Proportional to 3,910.92, 5,397.08 and 2,142.64

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Solution

The fourth proportional to 3,910.92, 5,397.08 and 2,142.64 is: 2,956.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.92 : 5,397.08 = 2,142.64 : x
  2. Step 2: Convert to fraction form
    3,910.92/5,397.08 = 2,142.64/x
  3. Step 3: Cross multiply
    3,910.92x = 5,397.08 × 2,142.64
  4. Step 4: Simplify right side
    3,910.92x = 11,563,999.49
  5. Step 5: Solve for x
    x = 11,563,999.49/3,910.92
  6. Step 6: Final answer
    x = 2,956.85

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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.