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Finding the Fourth Proportional to 13,993.83, 20,990.75 and 10,669.59

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Solution

The fourth proportional to 13,993.83, 20,990.75 and 10,669.59 is: 16,004.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,993.83 : 20,990.75 = 10,669.59 : x
  2. Step 2: Convert to fraction form
    13,993.83/20,990.75 = 10,669.59/x
  3. Step 3: Cross multiply
    13,993.83x = 20,990.75 × 10,669.59
  4. Step 4: Simplify right side
    13,993.83x = 223,962,642.94
  5. Step 5: Solve for x
    x = 223,962,642.94/13,993.83
  6. Step 6: Final answer
    x = 16,004.39

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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.