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Finding the Fourth Proportional to 5,179.53, 7,147.74 and 2,821.66

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Solution

The fourth proportional to 5,179.53, 7,147.74 and 2,821.66 is: 3,893.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.53 : 7,147.74 = 2,821.66 : x
  2. Step 2: Convert to fraction form
    5,179.53/7,147.74 = 2,821.66/x
  3. Step 3: Cross multiply
    5,179.53x = 7,147.74 × 2,821.66
  4. Step 4: Simplify right side
    5,179.53x = 20,168,492.05
  5. Step 5: Solve for x
    x = 20,168,492.05/5,179.53
  6. Step 6: Final answer
    x = 3,893.88

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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.