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Finding the Fourth Proportional to 13,994.60, 20,993.09 and 3,999.51

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Solution

The fourth proportional to 13,994.60, 20,993.09 and 3,999.51 is: 5,999.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,994.60 : 20,993.09 = 3,999.51 : x
  2. Step 2: Convert to fraction form
    13,994.60/20,993.09 = 3,999.51/x
  3. Step 3: Cross multiply
    13,994.60x = 20,993.09 × 3,999.51
  4. Step 4: Simplify right side
    13,994.60x = 83,962,053.39
  5. Step 5: Solve for x
    x = 83,962,053.39/13,994.60
  6. Step 6: Final answer
    x = 5,999.61

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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.