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Finding the Fourth Proportional to 8,635.79, 11,917.39 and 4,909.79

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Solution

The fourth proportional to 8,635.79, 11,917.39 and 4,909.79 is: 6,775.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,635.79 : 11,917.39 = 4,909.79 : x
  2. Step 2: Convert to fraction form
    8,635.79/11,917.39 = 4,909.79/x
  3. Step 3: Cross multiply
    8,635.79x = 11,917.39 × 4,909.79
  4. Step 4: Simplify right side
    8,635.79x = 58,511,882.25
  5. Step 5: Solve for x
    x = 58,511,882.25/8,635.79
  6. Step 6: Final answer
    x = 6,775.51

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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.