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Finding the Fourth Proportional to 5,179.32, 7,147.62 and 2,821.32

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Solution

The fourth proportional to 5,179.32, 7,147.62 and 2,821.32 is: 3,893.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.32 : 7,147.62 = 2,821.32 : x
  2. Step 2: Convert to fraction form
    5,179.32/7,147.62 = 2,821.32/x
  3. Step 3: Cross multiply
    5,179.32x = 7,147.62 × 2,821.32
  4. Step 4: Simplify right side
    5,179.32x = 20,165,723.26
  5. Step 5: Solve for x
    x = 20,165,723.26/5,179.32
  6. Step 6: Final answer
    x = 3,893.51

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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.