Home / 13,942.58-20,923.95-8,091.38

Finding the Fourth Proportional to 13,942.58, 20,923.95 and 8,091.38

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Solution

The fourth proportional to 13,942.58, 20,923.95 and 8,091.38 is: 12,142.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,942.58 : 20,923.95 = 8,091.38 : x
  2. Step 2: Convert to fraction form
    13,942.58/20,923.95 = 8,091.38/x
  3. Step 3: Cross multiply
    13,942.58x = 20,923.95 × 8,091.38
  4. Step 4: Simplify right side
    13,942.58x = 169,303,630.55
  5. Step 5: Solve for x
    x = 169,303,630.55/13,942.58
  6. Step 6: Final answer
    x = 12,142.92

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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.