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Finding the Fourth Proportional to 8,695.21, 11,996.62 and 4,917.91

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Solution

The fourth proportional to 8,695.21, 11,996.62 and 4,917.91 is: 6,785.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,695.21 : 11,996.62 = 4,917.91 : x
  2. Step 2: Convert to fraction form
    8,695.21/11,996.62 = 4,917.91/x
  3. Step 3: Cross multiply
    8,695.21x = 11,996.62 × 4,917.91
  4. Step 4: Simplify right side
    8,695.21x = 58,998,297.46
  5. Step 5: Solve for x
    x = 58,998,297.46/8,695.21
  6. Step 6: Final answer
    x = 6,785.15

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.