Home / 13,891.86-20,838.33-5,121.99

Finding the Fourth Proportional to 13,891.86, 20,838.33 and 5,121.99

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Solution

The fourth proportional to 13,891.86, 20,838.33 and 5,121.99 is: 7,683.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,891.86 : 20,838.33 = 5,121.99 : x
  2. Step 2: Convert to fraction form
    13,891.86/20,838.33 = 5,121.99/x
  3. Step 3: Cross multiply
    13,891.86x = 20,838.33 × 5,121.99
  4. Step 4: Simplify right side
    13,891.86x = 106,733,717.88
  5. Step 5: Solve for x
    x = 106,733,717.88/13,891.86
  6. Step 6: Final answer
    x = 7,683.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.