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Finding the Fourth Proportional to 11,951.21, 17,906.88 and 8,435.45

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Solution

The fourth proportional to 11,951.21, 17,906.88 and 8,435.45 is: 12,639.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,951.21 : 17,906.88 = 8,435.45 : x
  2. Step 2: Convert to fraction form
    11,951.21/17,906.88 = 8,435.45/x
  3. Step 3: Cross multiply
    11,951.21x = 17,906.88 × 8,435.45
  4. Step 4: Simplify right side
    11,951.21x = 151,052,590.90
  5. Step 5: Solve for x
    x = 151,052,590.90/11,951.21
  6. Step 6: Final answer
    x = 12,639.10

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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.