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Finding the Fourth Proportional to 19,138.88, 28,708.32 and 11,324.00

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Solution

The fourth proportional to 19,138.88, 28,708.32 and 11,324.00 is: 16,986.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,138.88 : 28,708.32 = 11,324.00 : x
  2. Step 2: Convert to fraction form
    19,138.88/28,708.32 = 11,324.00/x
  3. Step 3: Cross multiply
    19,138.88x = 28,708.32 × 11,324.00
  4. Step 4: Simplify right side
    19,138.88x = 325,093,129.92
  5. Step 5: Solve for x
    x = 325,093,129.92/19,138.88
  6. Step 6: Final answer
    x = 16,986.00

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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.