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Finding the Fourth Proportional to 13,911, 20,866.48 and 3,523.56

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Solution

The fourth proportional to 13,911, 20,866.48 and 3,523.56 is: 5,285.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,911 : 20,866.48 = 3,523.56 : x
  2. Step 2: Convert to fraction form
    13,911/20,866.48 = 3,523.56/x
  3. Step 3: Cross multiply
    13,911x = 20,866.48 × 3,523.56
  4. Step 4: Simplify right side
    13,911x = 73,524,294.27
  5. Step 5: Solve for x
    x = 73,524,294.27/13,911
  6. Step 6: Final answer
    x = 5,285.33

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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.