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Finding the Fourth Proportional to 18,819.65, 28,233.81 and 6,339.35

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Solution

The fourth proportional to 18,819.65, 28,233.81 and 6,339.35 is: 9,510.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.65 : 28,233.81 = 6,339.35 : x
  2. Step 2: Convert to fraction form
    18,819.65/28,233.81 = 6,339.35/x
  3. Step 3: Cross multiply
    18,819.65x = 28,233.81 × 6,339.35
  4. Step 4: Simplify right side
    18,819.65x = 178,983,862.25
  5. Step 5: Solve for x
    x = 178,983,862.25/18,819.65
  6. Step 6: Final answer
    x = 9,510.48

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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.