Home / 3,911-5,397.18-2,142.62

Finding the Fourth Proportional to 3,911, 5,397.18 and 2,142.62

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Solution

The fourth proportional to 3,911, 5,397.18 and 2,142.62 is: 2,956.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911 : 5,397.18 = 2,142.62 : x
  2. Step 2: Convert to fraction form
    3,911/5,397.18 = 2,142.62/x
  3. Step 3: Cross multiply
    3,911x = 5,397.18 × 2,142.62
  4. Step 4: Simplify right side
    3,911x = 11,564,105.81
  5. Step 5: Solve for x
    x = 11,564,105.81/3,911
  6. Step 6: Final answer
    x = 2,956.82

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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.