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Finding the Fourth Proportional to 15,978.34, 23,963.40 and 6,620.98

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Solution

The fourth proportional to 15,978.34, 23,963.40 and 6,620.98 is: 9,929.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,978.34 : 23,963.40 = 6,620.98 : x
  2. Step 2: Convert to fraction form
    15,978.34/23,963.40 = 6,620.98/x
  3. Step 3: Cross multiply
    15,978.34x = 23,963.40 × 6,620.98
  4. Step 4: Simplify right side
    15,978.34x = 158,661,192.13
  5. Step 5: Solve for x
    x = 158,661,192.13/15,978.34
  6. Step 6: Final answer
    x = 9,929.77

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