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Finding the Fourth Proportional to 8,518.61, 12,789.83 and 4,361.48

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Solution

The fourth proportional to 8,518.61, 12,789.83 and 4,361.48 is: 6,548.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,518.61 : 12,789.83 = 4,361.48 : x
  2. Step 2: Convert to fraction form
    8,518.61/12,789.83 = 4,361.48/x
  3. Step 3: Cross multiply
    8,518.61x = 12,789.83 × 4,361.48
  4. Step 4: Simplify right side
    8,518.61x = 55,782,587.75
  5. Step 5: Solve for x
    x = 55,782,587.75/8,518.61
  6. Step 6: Final answer
    x = 6,548.32

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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.