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Finding the Fourth Proportional to 13,976.01, 20,949.89 and 6,945.21

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Solution

The fourth proportional to 13,976.01, 20,949.89 and 6,945.21 is: 10,410.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,976.01 : 20,949.89 = 6,945.21 : x
  2. Step 2: Convert to fraction form
    13,976.01/20,949.89 = 6,945.21/x
  3. Step 3: Cross multiply
    13,976.01x = 20,949.89 × 6,945.21
  4. Step 4: Simplify right side
    13,976.01x = 145,501,350.80
  5. Step 5: Solve for x
    x = 145,501,350.80/13,976.01
  6. Step 6: Final answer
    x = 10,410.79

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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.