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Finding the Fourth Proportional to 18,979.24, 28,486.24 and 9,625.72

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Solution

The fourth proportional to 18,979.24, 28,486.24 and 9,625.72 is: 14,447.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.24 : 28,486.24 = 9,625.72 : x
  2. Step 2: Convert to fraction form
    18,979.24/28,486.24 = 9,625.72/x
  3. Step 3: Cross multiply
    18,979.24x = 28,486.24 × 9,625.72
  4. Step 4: Simplify right side
    18,979.24x = 274,200,570.09
  5. Step 5: Solve for x
    x = 274,200,570.09/18,979.24
  6. Step 6: Final answer
    x = 14,447.39

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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.