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Finding the Fourth Proportional to 19,992.20, 29,980.20 and 6,837.80

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Solution

The fourth proportional to 19,992.20, 29,980.20 and 6,837.80 is: 10,253.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.20 : 29,980.20 = 6,837.80 : x
  2. Step 2: Convert to fraction form
    19,992.20/29,980.20 = 6,837.80/x
  3. Step 3: Cross multiply
    19,992.20x = 29,980.20 × 6,837.80
  4. Step 4: Simplify right side
    19,992.20x = 204,998,611.56
  5. Step 5: Solve for x
    x = 204,998,611.56/19,992.20
  6. Step 6: Final answer
    x = 10,253.93

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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.