Home / 5,129.93-7,079.38-2,891.91

Finding the Fourth Proportional to 5,129.93, 7,079.38 and 2,891.91

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Solution

The fourth proportional to 5,129.93, 7,079.38 and 2,891.91 is: 3,990.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.93 : 7,079.38 = 2,891.91 : x
  2. Step 2: Convert to fraction form
    5,129.93/7,079.38 = 2,891.91/x
  3. Step 3: Cross multiply
    5,129.93x = 7,079.38 × 2,891.91
  4. Step 4: Simplify right side
    5,129.93x = 20,472,954.74
  5. Step 5: Solve for x
    x = 20,472,954.74/5,129.93
  6. Step 6: Final answer
    x = 3,990.89

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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.