Home / 20,855.98-28,783.78-11,781.73

Finding the Fourth Proportional to 20,855.98, 28,783.78 and 11,781.73

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Solution

The fourth proportional to 20,855.98, 28,783.78 and 11,781.73 is: 16,260.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.98 : 28,783.78 = 11,781.73 : x
  2. Step 2: Convert to fraction form
    20,855.98/28,783.78 = 11,781.73/x
  3. Step 3: Cross multiply
    20,855.98x = 28,783.78 × 11,781.73
  4. Step 4: Simplify right side
    20,855.98x = 339,122,716.18
  5. Step 5: Solve for x
    x = 339,122,716.18/20,855.98
  6. Step 6: Final answer
    x = 16,260.21

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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.