Home / 3,911.05-5,397.35-2,142.65

Finding the Fourth Proportional to 3,911.05, 5,397.35 and 2,142.65

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Solution

The fourth proportional to 3,911.05, 5,397.35 and 2,142.65 is: 2,956.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.05 : 5,397.35 = 2,142.65 : x
  2. Step 2: Convert to fraction form
    3,911.05/5,397.35 = 2,142.65/x
  3. Step 3: Cross multiply
    3,911.05x = 5,397.35 × 2,142.65
  4. Step 4: Simplify right side
    3,911.05x = 11,564,634.76
  5. Step 5: Solve for x
    x = 11,564,634.76/3,911.05
  6. Step 6: Final answer
    x = 2,956.91

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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.