Home / 8,640.20-12,961.50-3,091.96

Finding the Fourth Proportional to 8,640.20, 12,961.50 and 3,091.96

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Solution

The fourth proportional to 8,640.20, 12,961.50 and 3,091.96 is: 4,638.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.20 : 12,961.50 = 3,091.96 : x
  2. Step 2: Convert to fraction form
    8,640.20/12,961.50 = 3,091.96/x
  3. Step 3: Cross multiply
    8,640.20x = 12,961.50 × 3,091.96
  4. Step 4: Simplify right side
    8,640.20x = 40,076,439.54
  5. Step 5: Solve for x
    x = 40,076,439.54/8,640.20
  6. Step 6: Final answer
    x = 4,638.37

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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.