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Finding the Fourth Proportional to 30,021.78, 45,033.58 and 10,300.05

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Solution

The fourth proportional to 30,021.78, 45,033.58 and 10,300.05 is: 15,450.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,021.78 : 45,033.58 = 10,300.05 : x
  2. Step 2: Convert to fraction form
    30,021.78/45,033.58 = 10,300.05/x
  3. Step 3: Cross multiply
    30,021.78x = 45,033.58 × 10,300.05
  4. Step 4: Simplify right side
    30,021.78x = 463,848,125.68
  5. Step 5: Solve for x
    x = 463,848,125.68/30,021.78
  6. Step 6: Final answer
    x = 15,450.39

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