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Finding the Fourth Proportional to 31,978.40, 47,936.61 and 17,945.15

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Solution

The fourth proportional to 31,978.40, 47,936.61 and 17,945.15 is: 26,900.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,978.40 : 47,936.61 = 17,945.15 : x
  2. Step 2: Convert to fraction form
    31,978.40/47,936.61 = 17,945.15/x
  3. Step 3: Cross multiply
    31,978.40x = 47,936.61 × 17,945.15
  4. Step 4: Simplify right side
    31,978.40x = 860,229,417.26
  5. Step 5: Solve for x
    x = 860,229,417.26/31,978.40
  6. Step 6: Final answer
    x = 26,900.33

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Why These Related Problems?

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