Home / 12,639.80-18,932.34-8,243.92

Finding the Fourth Proportional to 12,639.80, 18,932.34 and 8,243.92

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Solution

The fourth proportional to 12,639.80, 18,932.34 and 8,243.92 is: 12,348.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.80 : 18,932.34 = 8,243.92 : x
  2. Step 2: Convert to fraction form
    12,639.80/18,932.34 = 8,243.92/x
  3. Step 3: Cross multiply
    12,639.80x = 18,932.34 × 8,243.92
  4. Step 4: Simplify right side
    12,639.80x = 156,076,696.37
  5. Step 5: Solve for x
    x = 156,076,696.37/12,639.80
  6. Step 6: Final answer
    x = 12,348.04

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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.