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Finding the Fourth Proportional to 19,991.10, 29,990.70 and 6,844.80

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Solution

The fourth proportional to 19,991.10, 29,990.70 and 6,844.80 is: 10,268.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.10 : 29,990.70 = 6,844.80 : x
  2. Step 2: Convert to fraction form
    19,991.10/29,990.70 = 6,844.80/x
  3. Step 3: Cross multiply
    19,991.10x = 29,990.70 × 6,844.80
  4. Step 4: Simplify right side
    19,991.10x = 205,280,343.36
  5. Step 5: Solve for x
    x = 205,280,343.36/19,991.10
  6. Step 6: Final answer
    x = 10,268.59

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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.