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Finding the Fourth Proportional to 18,819.69, 28,232.78 and 5,670.96

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Solution

The fourth proportional to 18,819.69, 28,232.78 and 5,670.96 is: 8,507.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.69 : 28,232.78 = 5,670.96 : x
  2. Step 2: Convert to fraction form
    18,819.69/28,232.78 = 5,670.96/x
  3. Step 3: Cross multiply
    18,819.69x = 28,232.78 × 5,670.96
  4. Step 4: Simplify right side
    18,819.69x = 160,106,937.71
  5. Step 5: Solve for x
    x = 160,106,937.71/18,819.69
  6. Step 6: Final answer
    x = 8,507.42

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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.