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Finding the Fourth Proportional to 20,796.88, 28,699.70 and 11,845.22

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Solution

The fourth proportional to 20,796.88, 28,699.70 and 11,845.22 is: 16,346.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,796.88 : 28,699.70 = 11,845.22 : x
  2. Step 2: Convert to fraction form
    20,796.88/28,699.70 = 11,845.22/x
  3. Step 3: Cross multiply
    20,796.88x = 28,699.70 × 11,845.22
  4. Step 4: Simplify right side
    20,796.88x = 339,954,071.96
  5. Step 5: Solve for x
    x = 339,954,071.96/20,796.88
  6. Step 6: Final answer
    x = 16,346.40

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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.