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Finding the Fourth Proportional to 18,756.92, 28,137.30 and 7,079.96

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Solution

The fourth proportional to 18,756.92, 28,137.30 and 7,079.96 is: 10,620.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.92 : 28,137.30 = 7,079.96 : x
  2. Step 2: Convert to fraction form
    18,756.92/28,137.30 = 7,079.96/x
  3. Step 3: Cross multiply
    18,756.92x = 28,137.30 × 7,079.96
  4. Step 4: Simplify right side
    18,756.92x = 199,210,958.51
  5. Step 5: Solve for x
    x = 199,210,958.51/18,756.92
  6. Step 6: Final answer
    x = 10,620.66

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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.