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Finding the Fourth Proportional to 26,890.47, 40,335.71 and 12,807.81

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Solution

The fourth proportional to 26,890.47, 40,335.71 and 12,807.81 is: 19,211.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,890.47 : 40,335.71 = 12,807.81 : x
  2. Step 2: Convert to fraction form
    26,890.47/40,335.71 = 12,807.81/x
  3. Step 3: Cross multiply
    26,890.47x = 40,335.71 × 12,807.81
  4. Step 4: Simplify right side
    26,890.47x = 516,612,045.86
  5. Step 5: Solve for x
    x = 516,612,045.86/26,890.47
  6. Step 6: Final answer
    x = 19,211.72

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