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Finding the Fourth Proportional to 11,691.99, 16,134.48 and 6,386.68

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Solution

The fourth proportional to 11,691.99, 16,134.48 and 6,386.68 is: 8,813.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,691.99 : 16,134.48 = 6,386.68 : x
  2. Step 2: Convert to fraction form
    11,691.99/16,134.48 = 6,386.68/x
  3. Step 3: Cross multiply
    11,691.99x = 16,134.48 × 6,386.68
  4. Step 4: Simplify right side
    11,691.99x = 103,045,760.73
  5. Step 5: Solve for x
    x = 103,045,760.73/11,691.99
  6. Step 6: Final answer
    x = 8,813.36

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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.