Home / 20,768.88-28,660.36-11,817.36

Finding the Fourth Proportional to 20,768.88, 28,660.36 and 11,817.36

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Solution

The fourth proportional to 20,768.88, 28,660.36 and 11,817.36 is: 16,307.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.88 : 28,660.36 = 11,817.36 : x
  2. Step 2: Convert to fraction form
    20,768.88/28,660.36 = 11,817.36/x
  3. Step 3: Cross multiply
    20,768.88x = 28,660.36 × 11,817.36
  4. Step 4: Simplify right side
    20,768.88x = 338,689,791.85
  5. Step 5: Solve for x
    x = 338,689,791.85/20,768.88
  6. Step 6: Final answer
    x = 16,307.56

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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.