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Finding the Fourth Proportional to 11,813.58, 16,305.11 and 6,781.21

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Solution

The fourth proportional to 11,813.58, 16,305.11 and 6,781.21 is: 9,359.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,813.58 : 16,305.11 = 6,781.21 : x
  2. Step 2: Convert to fraction form
    11,813.58/16,305.11 = 6,781.21/x
  3. Step 3: Cross multiply
    11,813.58x = 16,305.11 × 6,781.21
  4. Step 4: Simplify right side
    11,813.58x = 110,568,259.55
  5. Step 5: Solve for x
    x = 110,568,259.55/11,813.58
  6. Step 6: Final answer
    x = 9,359.42

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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.