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Finding the Fourth Proportional to 18,696.31, 28,036.25 and 7,001.33

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Solution

The fourth proportional to 18,696.31, 28,036.25 and 7,001.33 is: 10,498.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.31 : 28,036.25 = 7,001.33 : x
  2. Step 2: Convert to fraction form
    18,696.31/28,036.25 = 7,001.33/x
  3. Step 3: Cross multiply
    18,696.31x = 28,036.25 × 7,001.33
  4. Step 4: Simplify right side
    18,696.31x = 196,290,863.02
  5. Step 5: Solve for x
    x = 196,290,863.02/18,696.31
  6. Step 6: Final answer
    x = 10,498.91

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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.