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Finding the Fourth Proportional to 8,613.92, 12,919.46 and 3,066.44

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Solution

The fourth proportional to 8,613.92, 12,919.46 and 3,066.44 is: 4,599.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.92 : 12,919.46 = 3,066.44 : x
  2. Step 2: Convert to fraction form
    8,613.92/12,919.46 = 3,066.44/x
  3. Step 3: Cross multiply
    8,613.92x = 12,919.46 × 3,066.44
  4. Step 4: Simplify right side
    8,613.92x = 39,616,748.92
  5. Step 5: Solve for x
    x = 39,616,748.92/8,613.92
  6. Step 6: Final answer
    x = 4,599.15

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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.