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Finding the Fourth Proportional to 8,691.19, 11,993.37 and 4,914.12

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Solution

The fourth proportional to 8,691.19, 11,993.37 and 4,914.12 is: 6,781.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.19 : 11,993.37 = 4,914.12 : x
  2. Step 2: Convert to fraction form
    8,691.19/11,993.37 = 4,914.12/x
  3. Step 3: Cross multiply
    8,691.19x = 11,993.37 × 4,914.12
  4. Step 4: Simplify right side
    8,691.19x = 58,936,885.93
  5. Step 5: Solve for x
    x = 58,936,885.93/8,691.19
  6. Step 6: Final answer
    x = 6,781.22

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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.