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Finding the Fourth Proportional to 8,611.74, 12,919.43 and 3,066.79

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Solution

The fourth proportional to 8,611.74, 12,919.43 and 3,066.79 is: 4,600.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.74 : 12,919.43 = 3,066.79 : x
  2. Step 2: Convert to fraction form
    8,611.74/12,919.43 = 3,066.79/x
  3. Step 3: Cross multiply
    8,611.74x = 12,919.43 × 3,066.79
  4. Step 4: Simplify right side
    8,611.74x = 39,621,154.10
  5. Step 5: Solve for x
    x = 39,621,154.10/8,611.74
  6. Step 6: Final answer
    x = 4,600.83

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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.