Home / 5,129.62-7,079.31-2,891.92

Finding the Fourth Proportional to 5,129.62, 7,079.31 and 2,891.92

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Solution

The fourth proportional to 5,129.62, 7,079.31 and 2,891.92 is: 3,991.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.62 : 7,079.31 = 2,891.92 : x
  2. Step 2: Convert to fraction form
    5,129.62/7,079.31 = 2,891.92/x
  3. Step 3: Cross multiply
    5,129.62x = 7,079.31 × 2,891.92
  4. Step 4: Simplify right side
    5,129.62x = 20,472,798.18
  5. Step 5: Solve for x
    x = 20,472,798.18/5,129.62
  6. Step 6: Final answer
    x = 3,991.09

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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.