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Finding the Fourth Proportional to 13,990.83, 20,991.11 and 6,205.11

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Solution

The fourth proportional to 13,990.83, 20,991.11 and 6,205.11 is: 9,309.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.83 : 20,991.11 = 6,205.11 : x
  2. Step 2: Convert to fraction form
    13,990.83/20,991.11 = 6,205.11/x
  3. Step 3: Cross multiply
    13,990.83x = 20,991.11 × 6,205.11
  4. Step 4: Simplify right side
    13,990.83x = 130,252,115.55
  5. Step 5: Solve for x
    x = 130,252,115.55/13,990.83
  6. Step 6: Final answer
    x = 9,309.82

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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.