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Finding the Fourth Proportional to 8,129.75, 11,218.97 and 4,771.99

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Solution

The fourth proportional to 8,129.75, 11,218.97 and 4,771.99 is: 6,585.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.75 : 11,218.97 = 4,771.99 : x
  2. Step 2: Convert to fraction form
    8,129.75/11,218.97 = 4,771.99/x
  3. Step 3: Cross multiply
    8,129.75x = 11,218.97 × 4,771.99
  4. Step 4: Simplify right side
    8,129.75x = 53,536,786.92
  5. Step 5: Solve for x
    x = 53,536,786.92/8,129.75
  6. Step 6: Final answer
    x = 6,585.29

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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.