Home / 13,779-20,668.44-3,918.36

Finding the Fourth Proportional to 13,779, 20,668.44 and 3,918.36

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Solution

The fourth proportional to 13,779, 20,668.44 and 3,918.36 is: 5,877.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779 : 20,668.44 = 3,918.36 : x
  2. Step 2: Convert to fraction form
    13,779/20,668.44 = 3,918.36/x
  3. Step 3: Cross multiply
    13,779x = 20,668.44 × 3,918.36
  4. Step 4: Simplify right side
    13,779x = 80,986,388.56
  5. Step 5: Solve for x
    x = 80,986,388.56/13,779
  6. Step 6: Final answer
    x = 5,877.52

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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.