Home / 3,910.91-5,397.16-2,142.63

Finding the Fourth Proportional to 3,910.91, 5,397.16 and 2,142.63

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Solution

The fourth proportional to 3,910.91, 5,397.16 and 2,142.63 is: 2,956.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.91 : 5,397.16 = 2,142.63 : x
  2. Step 2: Convert to fraction form
    3,910.91/5,397.16 = 2,142.63/x
  3. Step 3: Cross multiply
    3,910.91x = 5,397.16 × 2,142.63
  4. Step 4: Simplify right side
    3,910.91x = 11,564,116.93
  5. Step 5: Solve for x
    x = 11,564,116.93/3,910.91
  6. Step 6: Final answer
    x = 2,956.89

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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.