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Finding the Fourth Proportional to 18,751.63, 28,119.23 and 8,893.72

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Solution

The fourth proportional to 18,751.63, 28,119.23 and 8,893.72 is: 13,336.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.63 : 28,119.23 = 8,893.72 : x
  2. Step 2: Convert to fraction form
    18,751.63/28,119.23 = 8,893.72/x
  3. Step 3: Cross multiply
    18,751.63x = 28,119.23 × 8,893.72
  4. Step 4: Simplify right side
    18,751.63x = 250,084,558.24
  5. Step 5: Solve for x
    x = 250,084,558.24/18,751.63
  6. Step 6: Final answer
    x = 13,336.69

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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.