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Finding the Fourth Proportional to 18,819.09, 28,230 and 5,672.49

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Solution

The fourth proportional to 18,819.09, 28,230 and 5,672.49 is: 8,509.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.09 : 28,230 = 5,672.49 : x
  2. Step 2: Convert to fraction form
    18,819.09/28,230 = 5,672.49/x
  3. Step 3: Cross multiply
    18,819.09x = 28,230 × 5,672.49
  4. Step 4: Simplify right side
    18,819.09x = 160,134,392.70
  5. Step 5: Solve for x
    x = 160,134,392.70/18,819.09
  6. Step 6: Final answer
    x = 8,509.15

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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.