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Finding the Fourth Proportional to 8,641.73, 12,951.81 and 3,705.65

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Solution

The fourth proportional to 8,641.73, 12,951.81 and 3,705.65 is: 5,553.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641.73 : 12,951.81 = 3,705.65 : x
  2. Step 2: Convert to fraction form
    8,641.73/12,951.81 = 3,705.65/x
  3. Step 3: Cross multiply
    8,641.73x = 12,951.81 × 3,705.65
  4. Step 4: Simplify right side
    8,641.73x = 47,994,858.54
  5. Step 5: Solve for x
    x = 47,994,858.54/8,641.73
  6. Step 6: Final answer
    x = 5,553.85

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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.