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Finding the Fourth Proportional to 19,201.51, 28,815.32 and 11,783.32

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Solution

The fourth proportional to 19,201.51, 28,815.32 and 11,783.32 is: 17,683.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,201.51 : 28,815.32 = 11,783.32 : x
  2. Step 2: Convert to fraction form
    19,201.51/28,815.32 = 11,783.32/x
  3. Step 3: Cross multiply
    19,201.51x = 28,815.32 × 11,783.32
  4. Step 4: Simplify right side
    19,201.51x = 339,540,222.83
  5. Step 5: Solve for x
    x = 339,540,222.83/19,201.51
  6. Step 6: Final answer
    x = 17,683.00

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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.