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Finding the Fourth Proportional to 13,959.99, 20,949.30 and 5,195.79

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Solution

The fourth proportional to 13,959.99, 20,949.30 and 5,195.79 is: 7,797.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.99 : 20,949.30 = 5,195.79 : x
  2. Step 2: Convert to fraction form
    13,959.99/20,949.30 = 5,195.79/x
  3. Step 3: Cross multiply
    13,959.99x = 20,949.30 × 5,195.79
  4. Step 4: Simplify right side
    13,959.99x = 108,848,163.45
  5. Step 5: Solve for x
    x = 108,848,163.45/13,959.99
  6. Step 6: Final answer
    x = 7,797.15

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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.