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Finding the Fourth Proportional to 8,640.02, 12,956.85 and 3,091.86

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Solution

The fourth proportional to 8,640.02, 12,956.85 and 3,091.86 is: 4,636.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.02 : 12,956.85 = 3,091.86 : x
  2. Step 2: Convert to fraction form
    8,640.02/12,956.85 = 3,091.86/x
  3. Step 3: Cross multiply
    8,640.02x = 12,956.85 × 3,091.86
  4. Step 4: Simplify right side
    8,640.02x = 40,060,766.24
  5. Step 5: Solve for x
    x = 40,060,766.24/8,640.02
  6. Step 6: Final answer
    x = 4,636.65

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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.