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Finding the Fourth Proportional to 30,630.70, 45,944.34 and 8,140.78

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Solution

The fourth proportional to 30,630.70, 45,944.34 and 8,140.78 is: 12,210.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,630.70 : 45,944.34 = 8,140.78 : x
  2. Step 2: Convert to fraction form
    30,630.70/45,944.34 = 8,140.78/x
  3. Step 3: Cross multiply
    30,630.70x = 45,944.34 × 8,140.78
  4. Step 4: Simplify right side
    30,630.70x = 374,022,764.19
  5. Step 5: Solve for x
    x = 374,022,764.19/30,630.70
  6. Step 6: Final answer
    x = 12,210.72

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