Home / 20,845.46-28,791.98-15,171.21

Finding the Fourth Proportional to 20,845.46, 28,791.98 and 15,171.21

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Solution

The fourth proportional to 20,845.46, 28,791.98 and 15,171.21 is: 20,954.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.46 : 28,791.98 = 15,171.21 : x
  2. Step 2: Convert to fraction form
    20,845.46/28,791.98 = 15,171.21/x
  3. Step 3: Cross multiply
    20,845.46x = 28,791.98 × 15,171.21
  4. Step 4: Simplify right side
    20,845.46x = 436,809,174.90
  5. Step 5: Solve for x
    x = 436,809,174.90/20,845.46
  6. Step 6: Final answer
    x = 20,954.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.