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Finding the Fourth Proportional to 20,744, 31,119.12 and 6,699.32

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Solution

The fourth proportional to 20,744, 31,119.12 and 6,699.32 is: 10,049.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,744 : 31,119.12 = 6,699.32 : x
  2. Step 2: Convert to fraction form
    20,744/31,119.12 = 6,699.32/x
  3. Step 3: Cross multiply
    20,744x = 31,119.12 × 6,699.32
  4. Step 4: Simplify right side
    20,744x = 208,476,943.00
  5. Step 5: Solve for x
    x = 208,476,943.00/20,744
  6. Step 6: Final answer
    x = 10,049.99

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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.