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Finding the Fourth Proportional to 12,800.31, 19,187.28 and 4,900.96

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Solution

The fourth proportional to 12,800.31, 19,187.28 and 4,900.96 is: 7,346.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,800.31 : 19,187.28 = 4,900.96 : x
  2. Step 2: Convert to fraction form
    12,800.31/19,187.28 = 4,900.96/x
  3. Step 3: Cross multiply
    12,800.31x = 19,187.28 × 4,900.96
  4. Step 4: Simplify right side
    12,800.31x = 94,036,091.79
  5. Step 5: Solve for x
    x = 94,036,091.79/12,800.31
  6. Step 6: Final answer
    x = 7,346.39

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