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Finding the Fourth Proportional to 18,933.30, 28,409.73 and 8,410.59

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Solution

The fourth proportional to 18,933.30, 28,409.73 and 8,410.59 is: 12,620.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,933.30 : 28,409.73 = 8,410.59 : x
  2. Step 2: Convert to fraction form
    18,933.30/28,409.73 = 8,410.59/x
  3. Step 3: Cross multiply
    18,933.30x = 28,409.73 × 8,410.59
  4. Step 4: Simplify right side
    18,933.30x = 238,942,591.04
  5. Step 5: Solve for x
    x = 238,942,591.04/18,933.30
  6. Step 6: Final answer
    x = 12,620.23

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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.