Home / 20,944-28,902.78-11,991.64

Finding the Fourth Proportional to 20,944, 28,902.78 and 11,991.64

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Solution

The fourth proportional to 20,944, 28,902.78 and 11,991.64 is: 16,548.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,944 : 28,902.78 = 11,991.64 : x
  2. Step 2: Convert to fraction form
    20,944/28,902.78 = 11,991.64/x
  3. Step 3: Cross multiply
    20,944x = 28,902.78 × 11,991.64
  4. Step 4: Simplify right side
    20,944x = 346,591,732.76
  5. Step 5: Solve for x
    x = 346,591,732.76/20,944
  6. Step 6: Final answer
    x = 16,548.50

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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.