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Finding the Fourth Proportional to 8,451.72, 12,679.38 and 2,608.74

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Solution

The fourth proportional to 8,451.72, 12,679.38 and 2,608.74 is: 3,913.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,451.72 : 12,679.38 = 2,608.74 : x
  2. Step 2: Convert to fraction form
    8,451.72/12,679.38 = 2,608.74/x
  3. Step 3: Cross multiply
    8,451.72x = 12,679.38 × 2,608.74
  4. Step 4: Simplify right side
    8,451.72x = 33,077,205.78
  5. Step 5: Solve for x
    x = 33,077,205.78/8,451.72
  6. Step 6: Final answer
    x = 3,913.67

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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.