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Finding the Fourth Proportional to 13,926.15, 20,918.39 and 11,739.15

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Solution

The fourth proportional to 13,926.15, 20,918.39 and 11,739.15 is: 17,633.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,926.15 : 20,918.39 = 11,739.15 : x
  2. Step 2: Convert to fraction form
    13,926.15/20,918.39 = 11,739.15/x
  3. Step 3: Cross multiply
    13,926.15x = 20,918.39 × 11,739.15
  4. Step 4: Simplify right side
    13,926.15x = 245,564,059.27
  5. Step 5: Solve for x
    x = 245,564,059.27/13,926.15
  6. Step 6: Final answer
    x = 17,633.31

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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.