Home / 20,768.81-28,662.26-11,817.09

Finding the Fourth Proportional to 20,768.81, 28,662.26 and 11,817.09

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Solution

The fourth proportional to 20,768.81, 28,662.26 and 11,817.09 is: 16,308.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.81 : 28,662.26 = 11,817.09 : x
  2. Step 2: Convert to fraction form
    20,768.81/28,662.26 = 11,817.09/x
  3. Step 3: Cross multiply
    20,768.81x = 28,662.26 × 11,817.09
  4. Step 4: Simplify right side
    20,768.81x = 338,704,446.94
  5. Step 5: Solve for x
    x = 338,704,446.94/20,768.81
  6. Step 6: Final answer
    x = 16,308.33

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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.