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Finding the Fourth Proportional to 18,932.30, 28,408.23 and 8,409.59

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Solution

The fourth proportional to 18,932.30, 28,408.23 and 8,409.59 is: 12,618.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,932.30 : 28,408.23 = 8,409.59 : x
  2. Step 2: Convert to fraction form
    18,932.30/28,408.23 = 8,409.59/x
  3. Step 3: Cross multiply
    18,932.30x = 28,408.23 × 8,409.59
  4. Step 4: Simplify right side
    18,932.30x = 238,901,424.88
  5. Step 5: Solve for x
    x = 238,901,424.88/18,932.30
  6. Step 6: Final answer
    x = 12,618.73

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1.5x scale

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.