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Finding the Fourth Proportional to 18,910.56, 28,352.68 and 8,374.86

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Solution

The fourth proportional to 18,910.56, 28,352.68 and 8,374.86 is: 12,556.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,910.56 : 28,352.68 = 8,374.86 : x
  2. Step 2: Convert to fraction form
    18,910.56/28,352.68 = 8,374.86/x
  3. Step 3: Cross multiply
    18,910.56x = 28,352.68 × 8,374.86
  4. Step 4: Simplify right side
    18,910.56x = 237,449,704.69
  5. Step 5: Solve for x
    x = 237,449,704.69/18,910.56
  6. Step 6: Final answer
    x = 12,556.46

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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.