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Finding the Fourth Proportional to 31,796.29, 43,879.05 and 19,866.54

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Solution

The fourth proportional to 31,796.29, 43,879.05 and 19,866.54 is: 27,415.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,796.29 : 43,879.05 = 19,866.54 : x
  2. Step 2: Convert to fraction form
    31,796.29/43,879.05 = 19,866.54/x
  3. Step 3: Cross multiply
    31,796.29x = 43,879.05 × 19,866.54
  4. Step 4: Simplify right side
    31,796.29x = 871,724,992.03
  5. Step 5: Solve for x
    x = 871,724,992.03/31,796.29
  6. Step 6: Final answer
    x = 27,415.94

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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.