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Finding the Fourth Proportional to 20,780.52, 31,171.04 and 6,929.52

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Solution

The fourth proportional to 20,780.52, 31,171.04 and 6,929.52 is: 10,394.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.52 : 31,171.04 = 6,929.52 : x
  2. Step 2: Convert to fraction form
    20,780.52/31,171.04 = 6,929.52/x
  3. Step 3: Cross multiply
    20,780.52x = 31,171.04 × 6,929.52
  4. Step 4: Simplify right side
    20,780.52x = 216,000,345.10
  5. Step 5: Solve for x
    x = 216,000,345.10/20,780.52
  6. Step 6: Final answer
    x = 10,394.37

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