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Finding the Fourth Proportional to 13,797.75, 20,559.60 and 13,128.30

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Solution

The fourth proportional to 13,797.75, 20,559.60 and 13,128.30 is: 19,562.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,797.75 : 20,559.60 = 13,128.30 : x
  2. Step 2: Convert to fraction form
    13,797.75/20,559.60 = 13,128.30/x
  3. Step 3: Cross multiply
    13,797.75x = 20,559.60 × 13,128.30
  4. Step 4: Simplify right side
    13,797.75x = 269,912,596.68
  5. Step 5: Solve for x
    x = 269,912,596.68/13,797.75
  6. Step 6: Final answer
    x = 19,562.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.