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Finding the Fourth Proportional to 19,991.56, 29,992.20 and 6,850.12

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Solution

The fourth proportional to 19,991.56, 29,992.20 and 6,850.12 is: 10,276.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.56 : 29,992.20 = 6,850.12 : x
  2. Step 2: Convert to fraction form
    19,991.56/29,992.20 = 6,850.12/x
  3. Step 3: Cross multiply
    19,991.56x = 29,992.20 × 6,850.12
  4. Step 4: Simplify right side
    19,991.56x = 205,450,169.06
  5. Step 5: Solve for x
    x = 205,450,169.06/19,991.56
  6. Step 6: Final answer
    x = 10,276.85

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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.