Home / 19,936.80-29,906.88-5,145.60

Finding the Fourth Proportional to 19,936.80, 29,906.88 and 5,145.60

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Solution

The fourth proportional to 19,936.80, 29,906.88 and 5,145.60 is: 7,718.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,936.80 : 29,906.88 = 5,145.60 : x
  2. Step 2: Convert to fraction form
    19,936.80/29,906.88 = 5,145.60/x
  3. Step 3: Cross multiply
    19,936.80x = 29,906.88 × 5,145.60
  4. Step 4: Simplify right side
    19,936.80x = 153,888,841.73
  5. Step 5: Solve for x
    x = 153,888,841.73/19,936.80
  6. Step 6: Final answer
    x = 7,718.83

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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.