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Finding the Fourth Proportional to 8,461.92, 12,698.37 and 3,784.80

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Solution

The fourth proportional to 8,461.92, 12,698.37 and 3,784.80 is: 5,679.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,461.92 : 12,698.37 = 3,784.80 : x
  2. Step 2: Convert to fraction form
    8,461.92/12,698.37 = 3,784.80/x
  3. Step 3: Cross multiply
    8,461.92x = 12,698.37 × 3,784.80
  4. Step 4: Simplify right side
    8,461.92x = 48,060,790.78
  5. Step 5: Solve for x
    x = 48,060,790.78/8,461.92
  6. Step 6: Final answer
    x = 5,679.66

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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.