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Finding the Fourth Proportional to 5,921.97, 8,861.05 and 4,872.21

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Solution

The fourth proportional to 5,921.97, 8,861.05 and 4,872.21 is: 7,290.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,921.97 : 8,861.05 = 4,872.21 : x
  2. Step 2: Convert to fraction form
    5,921.97/8,861.05 = 4,872.21/x
  3. Step 3: Cross multiply
    5,921.97x = 8,861.05 × 4,872.21
  4. Step 4: Simplify right side
    5,921.97x = 43,172,896.42
  5. Step 5: Solve for x
    x = 43,172,896.42/5,921.97
  6. Step 6: Final answer
    x = 7,290.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.