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Finding the Fourth Proportional to 19,881.36, 29,803.44 and 6,724.48

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Solution

The fourth proportional to 19,881.36, 29,803.44 and 6,724.48 is: 10,080.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,881.36 : 29,803.44 = 6,724.48 : x
  2. Step 2: Convert to fraction form
    19,881.36/29,803.44 = 6,724.48/x
  3. Step 3: Cross multiply
    19,881.36x = 29,803.44 × 6,724.48
  4. Step 4: Simplify right side
    19,881.36x = 200,412,636.21
  5. Step 5: Solve for x
    x = 200,412,636.21/19,881.36
  6. Step 6: Final answer
    x = 10,080.43

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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.