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Finding the Fourth Proportional to 8,469.78, 12,690.63 and 5,992.32

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Solution

The fourth proportional to 8,469.78, 12,690.63 and 5,992.32 is: 8,978.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,469.78 : 12,690.63 = 5,992.32 : x
  2. Step 2: Convert to fraction form
    8,469.78/12,690.63 = 5,992.32/x
  3. Step 3: Cross multiply
    8,469.78x = 12,690.63 × 5,992.32
  4. Step 4: Simplify right side
    8,469.78x = 76,046,315.96
  5. Step 5: Solve for x
    x = 76,046,315.96/8,469.78
  6. Step 6: Final answer
    x = 8,978.55

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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.