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Finding the Fourth Proportional to 11,163.99, 16,745.77 and 9,420.15

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Solution

The fourth proportional to 11,163.99, 16,745.77 and 9,420.15 is: 14,130.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,163.99 : 16,745.77 = 9,420.15 : x
  2. Step 2: Convert to fraction form
    11,163.99/16,745.77 = 9,420.15/x
  3. Step 3: Cross multiply
    11,163.99x = 16,745.77 × 9,420.15
  4. Step 4: Simplify right side
    11,163.99x = 157,747,665.27
  5. Step 5: Solve for x
    x = 157,747,665.27/11,163.99
  6. Step 6: Final answer
    x = 14,130.04

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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.