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Finding the Fourth Proportional to 11,107, 15,327.68 and 6,139

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Solution

The fourth proportional to 11,107, 15,327.68 and 6,139 is: 8,471.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,107 : 15,327.68 = 6,139 : x
  2. Step 2: Convert to fraction form
    11,107/15,327.68 = 6,139/x
  3. Step 3: Cross multiply
    11,107x = 15,327.68 × 6,139
  4. Step 4: Simplify right side
    11,107x = 94,096,627.52
  5. Step 5: Solve for x
    x = 94,096,627.52/11,107
  6. Step 6: Final answer
    x = 8,471.83

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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.