Home / 13,940.68-20,911.98-5,620.77

Finding the Fourth Proportional to 13,940.68, 20,911.98 and 5,620.77

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Solution

The fourth proportional to 13,940.68, 20,911.98 and 5,620.77 is: 8,431.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,940.68 : 20,911.98 = 5,620.77 : x
  2. Step 2: Convert to fraction form
    13,940.68/20,911.98 = 5,620.77/x
  3. Step 3: Cross multiply
    13,940.68x = 20,911.98 × 5,620.77
  4. Step 4: Simplify right side
    13,940.68x = 117,541,450.90
  5. Step 5: Solve for x
    x = 117,541,450.90/13,940.68
  6. Step 6: Final answer
    x = 8,431.54

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1.5x scale

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.