Home / 5,179.52-7,147.74-2,821.61

Finding the Fourth Proportional to 5,179.52, 7,147.74 and 2,821.61

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Solution

The fourth proportional to 5,179.52, 7,147.74 and 2,821.61 is: 3,893.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.52 : 7,147.74 = 2,821.61 : x
  2. Step 2: Convert to fraction form
    5,179.52/7,147.74 = 2,821.61/x
  3. Step 3: Cross multiply
    5,179.52x = 7,147.74 × 2,821.61
  4. Step 4: Simplify right side
    5,179.52x = 20,168,134.66
  5. Step 5: Solve for x
    x = 20,168,134.66/5,179.52
  6. Step 6: Final answer
    x = 3,893.82

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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.