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Finding the Fourth Proportional to 14,872.25, 20,523.90 and 8,157.44

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Solution

The fourth proportional to 14,872.25, 20,523.90 and 8,157.44 is: 11,257.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,872.25 : 20,523.90 = 8,157.44 : x
  2. Step 2: Convert to fraction form
    14,872.25/20,523.90 = 8,157.44/x
  3. Step 3: Cross multiply
    14,872.25x = 20,523.90 × 8,157.44
  4. Step 4: Simplify right side
    14,872.25x = 167,422,380.20
  5. Step 5: Solve for x
    x = 167,422,380.20/14,872.25
  6. Step 6: Final answer
    x = 11,257.37

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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.