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Finding the Fourth Proportional to 13,994.21, 20,994.09 and 3,999.05

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Solution

The fourth proportional to 13,994.21, 20,994.09 and 3,999.05 is: 5,999.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,994.21 : 20,994.09 = 3,999.05 : x
  2. Step 2: Convert to fraction form
    13,994.21/20,994.09 = 3,999.05/x
  3. Step 3: Cross multiply
    13,994.21x = 20,994.09 × 3,999.05
  4. Step 4: Simplify right side
    13,994.21x = 83,956,354.69
  5. Step 5: Solve for x
    x = 83,956,354.69/13,994.21
  6. Step 6: Final answer
    x = 5,999.36

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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.