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Finding the Fourth Proportional to 19,269.88, 28,904.82 and 5,418.88

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Solution

The fourth proportional to 19,269.88, 28,904.82 and 5,418.88 is: 8,128.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,269.88 : 28,904.82 = 5,418.88 : x
  2. Step 2: Convert to fraction form
    19,269.88/28,904.82 = 5,418.88/x
  3. Step 3: Cross multiply
    19,269.88x = 28,904.82 × 5,418.88
  4. Step 4: Simplify right side
    19,269.88x = 156,631,606.48
  5. Step 5: Solve for x
    x = 156,631,606.48/19,269.88
  6. Step 6: Final answer
    x = 8,128.31

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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.