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Finding the Fourth Proportional to 13,997.63, 20,996.60 and 5,991.31

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Solution

The fourth proportional to 13,997.63, 20,996.60 and 5,991.31 is: 8,987.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,997.63 : 20,996.60 = 5,991.31 : x
  2. Step 2: Convert to fraction form
    13,997.63/20,996.60 = 5,991.31/x
  3. Step 3: Cross multiply
    13,997.63x = 20,996.60 × 5,991.31
  4. Step 4: Simplify right side
    13,997.63x = 125,797,139.55
  5. Step 5: Solve for x
    x = 125,797,139.55/13,997.63
  6. Step 6: Final answer
    x = 8,987.03

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1.5x scale

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.