Home / 19,990.62-29,987.82-5,199.48

Finding the Fourth Proportional to 19,990.62, 29,987.82 and 5,199.48

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Solution

The fourth proportional to 19,990.62, 29,987.82 and 5,199.48 is: 7,799.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,990.62 : 29,987.82 = 5,199.48 : x
  2. Step 2: Convert to fraction form
    19,990.62/29,987.82 = 5,199.48/x
  3. Step 3: Cross multiply
    19,990.62x = 29,987.82 × 5,199.48
  4. Step 4: Simplify right side
    19,990.62x = 155,921,070.33
  5. Step 5: Solve for x
    x = 155,921,070.33/19,990.62
  6. Step 6: Final answer
    x = 7,799.71

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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.