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Finding the Fourth Proportional to 18,786.54, 28,165.23 and 7,696.02

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Solution

The fourth proportional to 18,786.54, 28,165.23 and 7,696.02 is: 11,538.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,786.54 : 28,165.23 = 7,696.02 : x
  2. Step 2: Convert to fraction form
    18,786.54/28,165.23 = 7,696.02/x
  3. Step 3: Cross multiply
    18,786.54x = 28,165.23 × 7,696.02
  4. Step 4: Simplify right side
    18,786.54x = 216,760,173.38
  5. Step 5: Solve for x
    x = 216,760,173.38/18,786.54
  6. Step 6: Final answer
    x = 11,538.06

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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.