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Finding the Fourth Proportional to 3,796.98, 5,239.68 and 2,118.47

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Solution

The fourth proportional to 3,796.98, 5,239.68 and 2,118.47 is: 2,923.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,796.98 : 5,239.68 = 2,118.47 : x
  2. Step 2: Convert to fraction form
    3,796.98/5,239.68 = 2,118.47/x
  3. Step 3: Cross multiply
    3,796.98x = 5,239.68 × 2,118.47
  4. Step 4: Simplify right side
    3,796.98x = 11,100,078.69
  5. Step 5: Solve for x
    x = 11,100,078.69/3,796.98
  6. Step 6: Final answer
    x = 2,923.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.