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Finding the Fourth Proportional to 8,613.70, 12,920.82 and 3,066.96

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Solution

The fourth proportional to 8,613.70, 12,920.82 and 3,066.96 is: 4,600.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.70 : 12,920.82 = 3,066.96 : x
  2. Step 2: Convert to fraction form
    8,613.70/12,920.82 = 3,066.96/x
  3. Step 3: Cross multiply
    8,613.70x = 12,920.82 × 3,066.96
  4. Step 4: Simplify right side
    8,613.70x = 39,627,638.11
  5. Step 5: Solve for x
    x = 39,627,638.11/8,613.70
  6. Step 6: Final answer
    x = 4,600.54

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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.