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Finding the Fourth Proportional to 18,969.52, 26,163.14 and 12,164.19

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Solution

The fourth proportional to 18,969.52, 26,163.14 and 12,164.19 is: 16,777.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,969.52 : 26,163.14 = 12,164.19 : x
  2. Step 2: Convert to fraction form
    18,969.52/26,163.14 = 12,164.19/x
  3. Step 3: Cross multiply
    18,969.52x = 26,163.14 × 12,164.19
  4. Step 4: Simplify right side
    18,969.52x = 318,253,247.02
  5. Step 5: Solve for x
    x = 318,253,247.02/18,969.52
  6. Step 6: Final answer
    x = 16,777.09

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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.