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Finding the Fourth Proportional to 18,755.92, 28,135.80 and 7,078.96

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Solution

The fourth proportional to 18,755.92, 28,135.80 and 7,078.96 is: 10,619.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,755.92 : 28,135.80 = 7,078.96 : x
  2. Step 2: Convert to fraction form
    18,755.92/28,135.80 = 7,078.96/x
  3. Step 3: Cross multiply
    18,755.92x = 28,135.80 × 7,078.96
  4. Step 4: Simplify right side
    18,755.92x = 199,172,202.77
  5. Step 5: Solve for x
    x = 199,172,202.77/18,755.92
  6. Step 6: Final answer
    x = 10,619.16

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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.