Home / 13,879.76-20,819.57-3,491.51

Finding the Fourth Proportional to 13,879.76, 20,819.57 and 3,491.51

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Solution

The fourth proportional to 13,879.76, 20,819.57 and 3,491.51 is: 5,237.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.76 : 20,819.57 = 3,491.51 : x
  2. Step 2: Convert to fraction form
    13,879.76/20,819.57 = 3,491.51/x
  3. Step 3: Cross multiply
    13,879.76x = 20,819.57 × 3,491.51
  4. Step 4: Simplify right side
    13,879.76x = 72,691,615.30
  5. Step 5: Solve for x
    x = 72,691,615.30/13,879.76
  6. Step 6: Final answer
    x = 5,237.24

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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.