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Finding the Fourth Proportional to 19,999.39, 27,601.59 and 11,615.89

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Solution

The fourth proportional to 19,999.39, 27,601.59 and 11,615.89 is: 16,031.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,999.39 : 27,601.59 = 11,615.89 : x
  2. Step 2: Convert to fraction form
    19,999.39/27,601.59 = 11,615.89/x
  3. Step 3: Cross multiply
    19,999.39x = 27,601.59 × 11,615.89
  4. Step 4: Simplify right side
    19,999.39x = 320,617,033.27
  5. Step 5: Solve for x
    x = 320,617,033.27/19,999.39
  6. Step 6: Final answer
    x = 16,031.34

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1.5x scale

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.