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Finding the Fourth Proportional to 10,219.16, 15,336.95 and 5,290.21

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Solution

The fourth proportional to 10,219.16, 15,336.95 and 5,290.21 is: 7,939.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,219.16 : 15,336.95 = 5,290.21 : x
  2. Step 2: Convert to fraction form
    10,219.16/15,336.95 = 5,290.21/x
  3. Step 3: Cross multiply
    10,219.16x = 15,336.95 × 5,290.21
  4. Step 4: Simplify right side
    10,219.16x = 81,135,678.98
  5. Step 5: Solve for x
    x = 81,135,678.98/10,219.16
  6. Step 6: Final answer
    x = 7,939.56

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