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Finding the Fourth Proportional to 18,751.13, 28,118.48 and 8,893.22

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Solution

The fourth proportional to 18,751.13, 28,118.48 and 8,893.22 is: 13,335.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.13 : 28,118.48 = 8,893.22 : x
  2. Step 2: Convert to fraction form
    18,751.13/28,118.48 = 8,893.22/x
  3. Step 3: Cross multiply
    18,751.13x = 28,118.48 × 8,893.22
  4. Step 4: Simplify right side
    18,751.13x = 250,063,828.71
  5. Step 5: Solve for x
    x = 250,063,828.71/18,751.13
  6. Step 6: Final answer
    x = 13,335.94

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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.