Home / 13,620.69-20,431.24-4,260.33

Finding the Fourth Proportional to 13,620.69, 20,431.24 and 4,260.33

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Solution

The fourth proportional to 13,620.69, 20,431.24 and 4,260.33 is: 6,390.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.69 : 20,431.24 = 4,260.33 : x
  2. Step 2: Convert to fraction form
    13,620.69/20,431.24 = 4,260.33/x
  3. Step 3: Cross multiply
    13,620.69x = 20,431.24 × 4,260.33
  4. Step 4: Simplify right side
    13,620.69x = 87,043,814.06
  5. Step 5: Solve for x
    x = 87,043,814.06/13,620.69
  6. Step 6: Final answer
    x = 6,390.56

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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.