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Finding the Fourth Proportional to 19,998.20, 29,989.20 and 6,843.80

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Solution

The fourth proportional to 19,998.20, 29,989.20 and 6,843.80 is: 10,262.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,998.20 : 29,989.20 = 6,843.80 : x
  2. Step 2: Convert to fraction form
    19,998.20/29,989.20 = 6,843.80/x
  3. Step 3: Cross multiply
    19,998.20x = 29,989.20 × 6,843.80
  4. Step 4: Simplify right side
    19,998.20x = 205,240,086.96
  5. Step 5: Solve for x
    x = 205,240,086.96/19,998.20
  6. Step 6: Final answer
    x = 10,262.93

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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.