Home / 13,919.72-20,879.58-3,389.68

Finding the Fourth Proportional to 13,919.72, 20,879.58 and 3,389.68

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Solution

The fourth proportional to 13,919.72, 20,879.58 and 3,389.68 is: 5,084.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.72 : 20,879.58 = 3,389.68 : x
  2. Step 2: Convert to fraction form
    13,919.72/20,879.58 = 3,389.68/x
  3. Step 3: Cross multiply
    13,919.72x = 20,879.58 × 3,389.68
  4. Step 4: Simplify right side
    13,919.72x = 70,774,990.34
  5. Step 5: Solve for x
    x = 70,774,990.34/13,919.72
  6. Step 6: Final answer
    x = 5,084.51

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Similar ratio
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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.