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Finding the Fourth Proportional to 8,520.90, 11,755.38 and 5,375.25

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Solution

The fourth proportional to 8,520.90, 11,755.38 and 5,375.25 is: 7,415.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.90 : 11,755.38 = 5,375.25 : x
  2. Step 2: Convert to fraction form
    8,520.90/11,755.38 = 5,375.25/x
  3. Step 3: Cross multiply
    8,520.90x = 11,755.38 × 5,375.25
  4. Step 4: Simplify right side
    8,520.90x = 63,188,106.35
  5. Step 5: Solve for x
    x = 63,188,106.35/8,520.90
  6. Step 6: Final answer
    x = 7,415.66

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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.