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Finding the Fourth Proportional to 8,885, 12,261.30 and 5,159

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Solution

The fourth proportional to 8,885, 12,261.30 and 5,159 is: 7,119.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,885 : 12,261.30 = 5,159 : x
  2. Step 2: Convert to fraction form
    8,885/12,261.30 = 5,159/x
  3. Step 3: Cross multiply
    8,885x = 12,261.30 × 5,159
  4. Step 4: Simplify right side
    8,885x = 63,256,046.70
  5. Step 5: Solve for x
    x = 63,256,046.70/8,885
  6. Step 6: Final answer
    x = 7,119.42

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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.