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Finding the Fourth Proportional to 18,833.58, 28,215.94 and 8,819.96

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Solution

The fourth proportional to 18,833.58, 28,215.94 and 8,819.96 is: 13,213.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,833.58 : 28,215.94 = 8,819.96 : x
  2. Step 2: Convert to fraction form
    18,833.58/28,215.94 = 8,819.96/x
  3. Step 3: Cross multiply
    18,833.58x = 28,215.94 × 8,819.96
  4. Step 4: Simplify right side
    18,833.58x = 248,863,462.16
  5. Step 5: Solve for x
    x = 248,863,462.16/18,833.58
  6. Step 6: Final answer
    x = 13,213.82

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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.