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Finding the Fourth Proportional to 8,613.21, 12,921.03 and 3,064.92

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Solution

The fourth proportional to 8,613.21, 12,921.03 and 3,064.92 is: 4,597.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.21 : 12,921.03 = 3,064.92 : x
  2. Step 2: Convert to fraction form
    8,613.21/12,921.03 = 3,064.92/x
  3. Step 3: Cross multiply
    8,613.21x = 12,921.03 × 3,064.92
  4. Step 4: Simplify right side
    8,613.21x = 39,601,923.27
  5. Step 5: Solve for x
    x = 39,601,923.27/8,613.21
  6. Step 6: Final answer
    x = 4,597.81

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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.