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Finding the Fourth Proportional to 8,691.55, 11,998.99 and 6,799.12

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Solution

The fourth proportional to 8,691.55, 11,998.99 and 6,799.12 is: 9,386.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.55 : 11,998.99 = 6,799.12 : x
  2. Step 2: Convert to fraction form
    8,691.55/11,998.99 = 6,799.12/x
  3. Step 3: Cross multiply
    8,691.55x = 11,998.99 × 6,799.12
  4. Step 4: Simplify right side
    8,691.55x = 81,582,551.39
  5. Step 5: Solve for x
    x = 81,582,551.39/8,691.55
  6. Step 6: Final answer
    x = 9,386.42

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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.