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Finding the Fourth Proportional to 19,992.96, 29,986.74 and 11,676.96

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Solution

The fourth proportional to 19,992.96, 29,986.74 and 11,676.96 is: 17,513.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,992.96 : 29,986.74 = 11,676.96 : x
  2. Step 2: Convert to fraction form
    19,992.96/29,986.74 = 11,676.96/x
  3. Step 3: Cross multiply
    19,992.96x = 29,986.74 × 11,676.96
  4. Step 4: Simplify right side
    19,992.96x = 350,153,963.51
  5. Step 5: Solve for x
    x = 350,153,963.51/19,992.96
  6. Step 6: Final answer
    x = 17,513.86

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1.5x scale

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.