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Finding the Fourth Proportional to 13,879.56, 20,819.16 and 3,349.50

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Solution

The fourth proportional to 13,879.56, 20,819.16 and 3,349.50 is: 5,024.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.56 : 20,819.16 = 3,349.50 : x
  2. Step 2: Convert to fraction form
    13,879.56/20,819.16 = 3,349.50/x
  3. Step 3: Cross multiply
    13,879.56x = 20,819.16 × 3,349.50
  4. Step 4: Simplify right side
    13,879.56x = 69,733,698.35
  5. Step 5: Solve for x
    x = 69,733,698.35/13,879.56
  6. Step 6: Final answer
    x = 5,024.20

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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.