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Finding the Fourth Proportional to 8,407.89, 12,608.18 and 2,859.75

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Solution

The fourth proportional to 8,407.89, 12,608.18 and 2,859.75 is: 4,288.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,407.89 : 12,608.18 = 2,859.75 : x
  2. Step 2: Convert to fraction form
    8,407.89/12,608.18 = 2,859.75/x
  3. Step 3: Cross multiply
    8,407.89x = 12,608.18 × 2,859.75
  4. Step 4: Simplify right side
    8,407.89x = 36,056,242.76
  5. Step 5: Solve for x
    x = 36,056,242.76/8,407.89
  6. Step 6: Final answer
    x = 4,288.38

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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.