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Finding the Fourth Proportional to 8,538.78, 12,811.17 and 4,380.75

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Solution

The fourth proportional to 8,538.78, 12,811.17 and 4,380.75 is: 6,572.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,538.78 : 12,811.17 = 4,380.75 : x
  2. Step 2: Convert to fraction form
    8,538.78/12,811.17 = 4,380.75/x
  3. Step 3: Cross multiply
    8,538.78x = 12,811.17 × 4,380.75
  4. Step 4: Simplify right side
    8,538.78x = 56,122,532.98
  5. Step 5: Solve for x
    x = 56,122,532.98/8,538.78
  6. Step 6: Final answer
    x = 6,572.66

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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.