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Finding the Fourth Proportional to 18,767.89, 28,162.94 and 6,929.92

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Solution

The fourth proportional to 18,767.89, 28,162.94 and 6,929.92 is: 10,398.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,767.89 : 28,162.94 = 6,929.92 : x
  2. Step 2: Convert to fraction form
    18,767.89/28,162.94 = 6,929.92/x
  3. Step 3: Cross multiply
    18,767.89x = 28,162.94 × 6,929.92
  4. Step 4: Simplify right side
    18,767.89x = 195,166,745.70
  5. Step 5: Solve for x
    x = 195,166,745.70/18,767.89
  6. Step 6: Final answer
    x = 10,398.97

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1.5x scale

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.