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Finding the Fourth Proportional to 19,843.15, 29,758.79 and 7,993.12

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Solution

The fourth proportional to 19,843.15, 29,758.79 and 7,993.12 is: 11,987.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,843.15 : 29,758.79 = 7,993.12 : x
  2. Step 2: Convert to fraction form
    19,843.15/29,758.79 = 7,993.12/x
  3. Step 3: Cross multiply
    19,843.15x = 29,758.79 × 7,993.12
  4. Step 4: Simplify right side
    19,843.15x = 237,865,539.56
  5. Step 5: Solve for x
    x = 237,865,539.56/19,843.15
  6. Step 6: Final answer
    x = 11,987.29

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1.5x scale

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.