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Finding the Fourth Proportional to 7,679.83, 11,520.84 and 2,750.86

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Solution

The fourth proportional to 7,679.83, 11,520.84 and 2,750.86 is: 4,126.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,679.83 : 11,520.84 = 2,750.86 : x
  2. Step 2: Convert to fraction form
    7,679.83/11,520.84 = 2,750.86/x
  3. Step 3: Cross multiply
    7,679.83x = 11,520.84 × 2,750.86
  4. Step 4: Simplify right side
    7,679.83x = 31,692,217.92
  5. Step 5: Solve for x
    x = 31,692,217.92/7,679.83
  6. Step 6: Final answer
    x = 4,126.68

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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.