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Finding the Fourth Proportional to 13,992.75, 20,989.53 and 3,604.50

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Solution

The fourth proportional to 13,992.75, 20,989.53 and 3,604.50 is: 5,406.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,992.75 : 20,989.53 = 3,604.50 : x
  2. Step 2: Convert to fraction form
    13,992.75/20,989.53 = 3,604.50/x
  3. Step 3: Cross multiply
    13,992.75x = 20,989.53 × 3,604.50
  4. Step 4: Simplify right side
    13,992.75x = 75,656,760.89
  5. Step 5: Solve for x
    x = 75,656,760.89/13,992.75
  6. Step 6: Final answer
    x = 5,406.85

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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.