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Finding the Fourth Proportional to 19,991.36, 27,583.80 and 11,603.36

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Solution

The fourth proportional to 19,991.36, 27,583.80 and 11,603.36 is: 16,010.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.36 : 27,583.80 = 11,603.36 : x
  2. Step 2: Convert to fraction form
    19,991.36/27,583.80 = 11,603.36/x
  3. Step 3: Cross multiply
    19,991.36x = 27,583.80 × 11,603.36
  4. Step 4: Simplify right side
    19,991.36x = 320,064,761.57
  5. Step 5: Solve for x
    x = 320,064,761.57/19,991.36
  6. Step 6: Final answer
    x = 16,010.15

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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.