Home / 13,406.58-20,109.78-5,620.86

Finding the Fourth Proportional to 13,406.58, 20,109.78 and 5,620.86

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Solution

The fourth proportional to 13,406.58, 20,109.78 and 5,620.86 is: 8,431.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,406.58 : 20,109.78 = 5,620.86 : x
  2. Step 2: Convert to fraction form
    13,406.58/20,109.78 = 5,620.86/x
  3. Step 3: Cross multiply
    13,406.58x = 20,109.78 × 5,620.86
  4. Step 4: Simplify right side
    13,406.58x = 113,034,258.01
  5. Step 5: Solve for x
    x = 113,034,258.01/13,406.58
  6. Step 6: Final answer
    x = 8,431.25

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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.