Home / 13,981.46-20,975.84-5,216.45

Finding the Fourth Proportional to 13,981.46, 20,975.84 and 5,216.45

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Solution

The fourth proportional to 13,981.46, 20,975.84 and 5,216.45 is: 7,826.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.46 : 20,975.84 = 5,216.45 : x
  2. Step 2: Convert to fraction form
    13,981.46/20,975.84 = 5,216.45/x
  3. Step 3: Cross multiply
    13,981.46x = 20,975.84 × 5,216.45
  4. Step 4: Simplify right side
    13,981.46x = 109,419,289.61
  5. Step 5: Solve for x
    x = 109,419,289.61/13,981.46
  6. Step 6: Final answer
    x = 7,826.03

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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.