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Finding the Fourth Proportional to 8,613.16, 12,917.50 and 4,229.80

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Solution

The fourth proportional to 8,613.16, 12,917.50 and 4,229.80 is: 6,343.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.16 : 12,917.50 = 4,229.80 : x
  2. Step 2: Convert to fraction form
    8,613.16/12,917.50 = 4,229.80/x
  3. Step 3: Cross multiply
    8,613.16x = 12,917.50 × 4,229.80
  4. Step 4: Simplify right side
    8,613.16x = 54,638,441.50
  5. Step 5: Solve for x
    x = 54,638,441.50/8,613.16
  6. Step 6: Final answer
    x = 6,343.60

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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.