Home / 20,869.21-31,293.91-12,106.81

Finding the Fourth Proportional to 20,869.21, 31,293.91 and 12,106.81

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Solution

The fourth proportional to 20,869.21, 31,293.91 and 12,106.81 is: 18,154.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.21 : 31,293.91 = 12,106.81 : x
  2. Step 2: Convert to fraction form
    20,869.21/31,293.91 = 12,106.81/x
  3. Step 3: Cross multiply
    20,869.21x = 31,293.91 × 12,106.81
  4. Step 4: Simplify right side
    20,869.21x = 378,869,422.53
  5. Step 5: Solve for x
    x = 378,869,422.53/20,869.21
  6. Step 6: Final answer
    x = 18,154.47

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