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Finding the Fourth Proportional to 11,407.72, 15,743.64 and 6,692.80

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Solution

The fourth proportional to 11,407.72, 15,743.64 and 6,692.80 is: 9,236.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,407.72 : 15,743.64 = 6,692.80 : x
  2. Step 2: Convert to fraction form
    11,407.72/15,743.64 = 6,692.80/x
  3. Step 3: Cross multiply
    11,407.72x = 15,743.64 × 6,692.80
  4. Step 4: Simplify right side
    11,407.72x = 105,369,033.79
  5. Step 5: Solve for x
    x = 105,369,033.79/11,407.72
  6. Step 6: Final answer
    x = 9,236.64

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