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Finding the Fourth Proportional to 8,679.72, 12,993.66 and 5,909.16

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Solution

The fourth proportional to 8,679.72, 12,993.66 and 5,909.16 is: 8,846.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.72 : 12,993.66 = 5,909.16 : x
  2. Step 2: Convert to fraction form
    8,679.72/12,993.66 = 5,909.16/x
  3. Step 3: Cross multiply
    8,679.72x = 12,993.66 × 5,909.16
  4. Step 4: Simplify right side
    8,679.72x = 76,781,615.93
  5. Step 5: Solve for x
    x = 76,781,615.93/8,679.72
  6. Step 6: Final answer
    x = 8,846.09

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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.