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Finding the Fourth Proportional to 8,691.05, 11,994.33 and 7,339.21

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Solution

The fourth proportional to 8,691.05, 11,994.33 and 7,339.21 is: 10,128.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.05 : 11,994.33 = 7,339.21 : x
  2. Step 2: Convert to fraction form
    8,691.05/11,994.33 = 7,339.21/x
  3. Step 3: Cross multiply
    8,691.05x = 11,994.33 × 7,339.21
  4. Step 4: Simplify right side
    8,691.05x = 88,028,862.93
  5. Step 5: Solve for x
    x = 88,028,862.93/8,691.05
  6. Step 6: Final answer
    x = 10,128.68

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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.