Home / 28,115.26-42,166.67-8,120.41

Finding the Fourth Proportional to 28,115.26, 42,166.67 and 8,120.41

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Solution

The fourth proportional to 28,115.26, 42,166.67 and 8,120.41 is: 12,178.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.26 : 42,166.67 = 8,120.41 : x
  2. Step 2: Convert to fraction form
    28,115.26/42,166.67 = 8,120.41/x
  3. Step 3: Cross multiply
    28,115.26x = 42,166.67 × 8,120.41
  4. Step 4: Simplify right side
    28,115.26x = 342,410,608.13
  5. Step 5: Solve for x
    x = 342,410,608.13/28,115.26
  6. Step 6: Final answer
    x = 12,178.82

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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.