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Finding the Fourth Proportional to 19,992.10, 29,992.20 and 6,845.80

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Solution

The fourth proportional to 19,992.10, 29,992.20 and 6,845.80 is: 10,270.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.10 : 29,992.20 = 6,845.80 : x
  2. Step 2: Convert to fraction form
    19,992.10/29,992.20 = 6,845.80/x
  3. Step 3: Cross multiply
    19,992.10x = 29,992.20 × 6,845.80
  4. Step 4: Simplify right side
    19,992.10x = 205,320,602.76
  5. Step 5: Solve for x
    x = 205,320,602.76/19,992.10
  6. Step 6: Final answer
    x = 10,270.09

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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.