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Finding the Fourth Proportional to 35,815.40, 53,706.90 and 13,621.40

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Solution

The fourth proportional to 35,815.40, 53,706.90 and 13,621.40 is: 20,425.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,815.40 : 53,706.90 = 13,621.40 : x
  2. Step 2: Convert to fraction form
    35,815.40/53,706.90 = 13,621.40/x
  3. Step 3: Cross multiply
    35,815.40x = 53,706.90 × 13,621.40
  4. Step 4: Simplify right side
    35,815.40x = 731,563,167.66
  5. Step 5: Solve for x
    x = 731,563,167.66/35,815.40
  6. Step 6: Final answer
    x = 20,425.94

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