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Finding the Fourth Proportional to 28,326, 39,099.60 and 17,148

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Solution

The fourth proportional to 28,326, 39,099.60 and 17,148 is: 23,670.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,326 : 39,099.60 = 17,148 : x
  2. Step 2: Convert to fraction form
    28,326/39,099.60 = 17,148/x
  3. Step 3: Cross multiply
    28,326x = 39,099.60 × 17,148
  4. Step 4: Simplify right side
    28,326x = 670,479,940.80
  5. Step 5: Solve for x
    x = 670,479,940.80/28,326
  6. Step 6: Final answer
    x = 23,670.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.