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Finding the Fourth Proportional to 21,035.08, 31,568.94 and 7,899.40

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Solution

The fourth proportional to 21,035.08, 31,568.94 and 7,899.40 is: 11,855.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,035.08 : 31,568.94 = 7,899.40 : x
  2. Step 2: Convert to fraction form
    21,035.08/31,568.94 = 7,899.40/x
  3. Step 3: Cross multiply
    21,035.08x = 31,568.94 × 7,899.40
  4. Step 4: Simplify right side
    21,035.08x = 249,375,684.64
  5. Step 5: Solve for x
    x = 249,375,684.64/21,035.08
  6. Step 6: Final answer
    x = 11,855.23

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