Home / 20,985.78-28,960.57-11,554.68

Finding the Fourth Proportional to 20,985.78, 28,960.57 and 11,554.68

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Solution

The fourth proportional to 20,985.78, 28,960.57 and 11,554.68 is: 15,945.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.78 : 28,960.57 = 11,554.68 : x
  2. Step 2: Convert to fraction form
    20,985.78/28,960.57 = 11,554.68/x
  3. Step 3: Cross multiply
    20,985.78x = 28,960.57 × 11,554.68
  4. Step 4: Simplify right side
    20,985.78x = 334,629,959.81
  5. Step 5: Solve for x
    x = 334,629,959.81/20,985.78
  6. Step 6: Final answer
    x = 15,945.56

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