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Finding the Fourth Proportional to 8,640.86, 12,961.31 and 2,401.21

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Solution

The fourth proportional to 8,640.86, 12,961.31 and 2,401.21 is: 3,601.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.86 : 12,961.31 = 2,401.21 : x
  2. Step 2: Convert to fraction form
    8,640.86/12,961.31 = 2,401.21/x
  3. Step 3: Cross multiply
    8,640.86x = 12,961.31 × 2,401.21
  4. Step 4: Simplify right side
    8,640.86x = 31,122,827.19
  5. Step 5: Solve for x
    x = 31,122,827.19/8,640.86
  6. Step 6: Final answer
    x = 3,601.82

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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.