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Finding the Fourth Proportional to 13,779.86, 20,655.20 and 6,762.02

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Solution

The fourth proportional to 13,779.86, 20,655.20 and 6,762.02 is: 10,135.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.86 : 20,655.20 = 6,762.02 : x
  2. Step 2: Convert to fraction form
    13,779.86/20,655.20 = 6,762.02/x
  3. Step 3: Cross multiply
    13,779.86x = 20,655.20 × 6,762.02
  4. Step 4: Simplify right side
    13,779.86x = 139,670,789.13
  5. Step 5: Solve for x
    x = 139,670,789.13/13,779.86
  6. Step 6: Final answer
    x = 10,135.87

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