Home / 13,779.63-20,670.39-3,919.68

Finding the Fourth Proportional to 13,779.63, 20,670.39 and 3,919.68

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Solution

The fourth proportional to 13,779.63, 20,670.39 and 3,919.68 is: 5,879.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.63 : 20,670.39 = 3,919.68 : x
  2. Step 2: Convert to fraction form
    13,779.63/20,670.39 = 3,919.68/x
  3. Step 3: Cross multiply
    13,779.63x = 20,670.39 × 3,919.68
  4. Step 4: Simplify right side
    13,779.63x = 81,021,314.28
  5. Step 5: Solve for x
    x = 81,021,314.28/13,779.63
  6. Step 6: Final answer
    x = 5,879.79

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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.