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Finding the Fourth Proportional to 18,804.65, 28,212.44 and 11,316.60

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Solution

The fourth proportional to 18,804.65, 28,212.44 and 11,316.60 is: 16,978.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.65 : 28,212.44 = 11,316.60 : x
  2. Step 2: Convert to fraction form
    18,804.65/28,212.44 = 11,316.60/x
  3. Step 3: Cross multiply
    18,804.65x = 28,212.44 × 11,316.60
  4. Step 4: Simplify right side
    18,804.65x = 319,268,841.92
  5. Step 5: Solve for x
    x = 319,268,841.92/18,804.65
  6. Step 6: Final answer
    x = 16,978.19

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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.