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Finding the Fourth Proportional to 11,435.55, 17,149.20 and 7,917.21

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Solution

The fourth proportional to 11,435.55, 17,149.20 and 7,917.21 is: 11,872.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,435.55 : 17,149.20 = 7,917.21 : x
  2. Step 2: Convert to fraction form
    11,435.55/17,149.20 = 7,917.21/x
  3. Step 3: Cross multiply
    11,435.55x = 17,149.20 × 7,917.21
  4. Step 4: Simplify right side
    11,435.55x = 135,773,817.73
  5. Step 5: Solve for x
    x = 135,773,817.73/11,435.55
  6. Step 6: Final answer
    x = 11,872.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.