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Finding the Fourth Proportional to 8,481.42, 12,720.54 and 3,549.74

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Solution

The fourth proportional to 8,481.42, 12,720.54 and 3,549.74 is: 5,323.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,481.42 : 12,720.54 = 3,549.74 : x
  2. Step 2: Convert to fraction form
    8,481.42/12,720.54 = 3,549.74/x
  3. Step 3: Cross multiply
    8,481.42x = 12,720.54 × 3,549.74
  4. Step 4: Simplify right side
    8,481.42x = 45,154,609.66
  5. Step 5: Solve for x
    x = 45,154,609.66/8,481.42
  6. Step 6: Final answer
    x = 5,323.94

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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.