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Finding the Fourth Proportional to 20,998.44, 28,976.54 and 11,567.00

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Solution

The fourth proportional to 20,998.44, 28,976.54 and 11,567.00 is: 15,961.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.44 : 28,976.54 = 11,567.00 : x
  2. Step 2: Convert to fraction form
    20,998.44/28,976.54 = 11,567.00/x
  3. Step 3: Cross multiply
    20,998.44x = 28,976.54 × 11,567.00
  4. Step 4: Simplify right side
    20,998.44x = 335,171,652.79
  5. Step 5: Solve for x
    x = 335,171,652.79/20,998.44
  6. Step 6: Final answer
    x = 15,961.74

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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.