Home / 28,453.44-42,645.60-20,135.90

Finding the Fourth Proportional to 28,453.44, 42,645.60 and 20,135.90

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Solution

The fourth proportional to 28,453.44, 42,645.60 and 20,135.90 is: 30,179.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,453.44 : 42,645.60 = 20,135.90 : x
  2. Step 2: Convert to fraction form
    28,453.44/42,645.60 = 20,135.90/x
  3. Step 3: Cross multiply
    28,453.44x = 42,645.60 × 20,135.90
  4. Step 4: Simplify right side
    28,453.44x = 858,707,537.04
  5. Step 5: Solve for x
    x = 858,707,537.04/28,453.44
  6. Step 6: Final answer
    x = 30,179.39

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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.