Home / 12,939.13-17,861.61-8,163.37

Finding the Fourth Proportional to 12,939.13, 17,861.61 and 8,163.37

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Solution

The fourth proportional to 12,939.13, 17,861.61 and 8,163.37 is: 11,268.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.13 : 17,861.61 = 8,163.37 : x
  2. Step 2: Convert to fraction form
    12,939.13/17,861.61 = 8,163.37/x
  3. Step 3: Cross multiply
    12,939.13x = 17,861.61 × 8,163.37
  4. Step 4: Simplify right side
    12,939.13x = 145,810,931.23
  5. Step 5: Solve for x
    x = 145,810,931.23/12,939.13
  6. Step 6: Final answer
    x = 11,268.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.