Home / 13,779.42-20,668.95-3,391.26

Finding the Fourth Proportional to 13,779.42, 20,668.95 and 3,391.26

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Solution

The fourth proportional to 13,779.42, 20,668.95 and 3,391.26 is: 5,086.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.42 : 20,668.95 = 3,391.26 : x
  2. Step 2: Convert to fraction form
    13,779.42/20,668.95 = 3,391.26/x
  3. Step 3: Cross multiply
    13,779.42x = 20,668.95 × 3,391.26
  4. Step 4: Simplify right side
    13,779.42x = 70,093,783.38
  5. Step 5: Solve for x
    x = 70,093,783.38/13,779.42
  6. Step 6: Final answer
    x = 5,086.85

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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.