Home / 13,679.12-20,518.74-3,819.08

Finding the Fourth Proportional to 13,679.12, 20,518.74 and 3,819.08

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Solution

The fourth proportional to 13,679.12, 20,518.74 and 3,819.08 is: 5,728.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.12 : 20,518.74 = 3,819.08 : x
  2. Step 2: Convert to fraction form
    13,679.12/20,518.74 = 3,819.08/x
  3. Step 3: Cross multiply
    13,679.12x = 20,518.74 × 3,819.08
  4. Step 4: Simplify right side
    13,679.12x = 78,362,709.56
  5. Step 5: Solve for x
    x = 78,362,709.56/13,679.12
  6. Step 6: Final answer
    x = 5,728.64

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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.