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Finding the Fourth Proportional to 18,819.78, 28,231.03 and 5,673.17

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Solution

The fourth proportional to 18,819.78, 28,231.03 and 5,673.17 is: 8,510.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.78 : 28,231.03 = 5,673.17 : x
  2. Step 2: Convert to fraction form
    18,819.78/28,231.03 = 5,673.17/x
  3. Step 3: Cross multiply
    18,819.78x = 28,231.03 × 5,673.17
  4. Step 4: Simplify right side
    18,819.78x = 160,159,510.13
  5. Step 5: Solve for x
    x = 160,159,510.13/18,819.78
  6. Step 6: Final answer
    x = 8,510.17

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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.