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Finding the Fourth Proportional to 11,691.67, 16,134.78 and 6,386.98

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Solution

The fourth proportional to 11,691.67, 16,134.78 and 6,386.98 is: 8,814.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,691.67 : 16,134.78 = 6,386.98 : x
  2. Step 2: Convert to fraction form
    11,691.67/16,134.78 = 6,386.98/x
  3. Step 3: Cross multiply
    11,691.67x = 16,134.78 × 6,386.98
  4. Step 4: Simplify right side
    11,691.67x = 103,052,517.16
  5. Step 5: Solve for x
    x = 103,052,517.16/11,691.67
  6. Step 6: Final answer
    x = 8,814.18

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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.