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Finding the Fourth Proportional to 13,994.64, 20,991.26 and 5,228.87

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Solution

The fourth proportional to 13,994.64, 20,991.26 and 5,228.87 is: 7,843.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,994.64 : 20,991.26 = 5,228.87 : x
  2. Step 2: Convert to fraction form
    13,994.64/20,991.26 = 5,228.87/x
  3. Step 3: Cross multiply
    13,994.64x = 20,991.26 × 5,228.87
  4. Step 4: Simplify right side
    13,994.64x = 109,760,477.79
  5. Step 5: Solve for x
    x = 109,760,477.79/13,994.64
  6. Step 6: Final answer
    x = 7,843.04

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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.