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Finding the Fourth Proportional to 8,767.78, 13,157.42 and 3,221.17

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Solution

The fourth proportional to 8,767.78, 13,157.42 and 3,221.17 is: 4,833.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,767.78 : 13,157.42 = 3,221.17 : x
  2. Step 2: Convert to fraction form
    8,767.78/13,157.42 = 3,221.17/x
  3. Step 3: Cross multiply
    8,767.78x = 13,157.42 × 3,221.17
  4. Step 4: Simplify right side
    8,767.78x = 42,382,237.58
  5. Step 5: Solve for x
    x = 42,382,237.58/8,767.78
  6. Step 6: Final answer
    x = 4,833.86

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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.