Home / 13,981.82-20,967.26-5,211.95

Finding the Fourth Proportional to 13,981.82, 20,967.26 and 5,211.95

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Solution

The fourth proportional to 13,981.82, 20,967.26 and 5,211.95 is: 7,815.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.82 : 20,967.26 = 5,211.95 : x
  2. Step 2: Convert to fraction form
    13,981.82/20,967.26 = 5,211.95/x
  3. Step 3: Cross multiply
    13,981.82x = 20,967.26 × 5,211.95
  4. Step 4: Simplify right side
    13,981.82x = 109,280,179.86
  5. Step 5: Solve for x
    x = 109,280,179.86/13,981.82
  6. Step 6: Final answer
    x = 7,815.88

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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.