Home / 18,940.24-28,400.34-8,405.68

Finding the Fourth Proportional to 18,940.24, 28,400.34 and 8,405.68

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Solution

The fourth proportional to 18,940.24, 28,400.34 and 8,405.68 is: 12,604.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.24 : 28,400.34 = 8,405.68 : x
  2. Step 2: Convert to fraction form
    18,940.24/28,400.34 = 8,405.68/x
  3. Step 3: Cross multiply
    18,940.24x = 28,400.34 × 8,405.68
  4. Step 4: Simplify right side
    18,940.24x = 238,724,027.93
  5. Step 5: Solve for x
    x = 238,724,027.93/18,940.24
  6. Step 6: Final answer
    x = 12,604.07

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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.