Home / 20,990.23-28,966.44-11,558.78

Finding the Fourth Proportional to 20,990.23, 28,966.44 and 11,558.78

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Solution

The fourth proportional to 20,990.23, 28,966.44 and 11,558.78 is: 15,951.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.23 : 28,966.44 = 11,558.78 : x
  2. Step 2: Convert to fraction form
    20,990.23/28,966.44 = 11,558.78/x
  3. Step 3: Cross multiply
    20,990.23x = 28,966.44 × 11,558.78
  4. Step 4: Simplify right side
    20,990.23x = 334,816,707.34
  5. Step 5: Solve for x
    x = 334,816,707.34/20,990.23
  6. Step 6: Final answer
    x = 15,951.07

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