Home / 20,942.39-31,415.11-7,794.75

Finding the Fourth Proportional to 20,942.39, 31,415.11 and 7,794.75

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Solution

The fourth proportional to 20,942.39, 31,415.11 and 7,794.75 is: 11,692.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.39 : 31,415.11 = 7,794.75 : x
  2. Step 2: Convert to fraction form
    20,942.39/31,415.11 = 7,794.75/x
  3. Step 3: Cross multiply
    20,942.39x = 31,415.11 × 7,794.75
  4. Step 4: Simplify right side
    20,942.39x = 244,872,909.19
  5. Step 5: Solve for x
    x = 244,872,909.19/20,942.39
  6. Step 6: Final answer
    x = 11,692.69

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1.5x scale

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.