Home / 39,896.82-55,058.40-21,993.12

Finding the Fourth Proportional to 39,896.82, 55,058.40 and 21,993.12

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Solution

The fourth proportional to 39,896.82, 55,058.40 and 21,993.12 is: 30,350.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,896.82 : 55,058.40 = 21,993.12 : x
  2. Step 2: Convert to fraction form
    39,896.82/55,058.40 = 21,993.12/x
  3. Step 3: Cross multiply
    39,896.82x = 55,058.40 × 21,993.12
  4. Step 4: Simplify right side
    39,896.82x = 1,210,905,998.21
  5. Step 5: Solve for x
    x = 1,210,905,998.21/39,896.82
  6. Step 6: Final answer
    x = 30,350.94

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Half scale
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Double scale
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Similar ratio
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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.