Home / 13,986.90-20,975.46-4,123.56

Finding the Fourth Proportional to 13,986.90, 20,975.46 and 4,123.56

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Solution

The fourth proportional to 13,986.90, 20,975.46 and 4,123.56 is: 6,183.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.90 : 20,975.46 = 4,123.56 : x
  2. Step 2: Convert to fraction form
    13,986.90/20,975.46 = 4,123.56/x
  3. Step 3: Cross multiply
    13,986.90x = 20,975.46 × 4,123.56
  4. Step 4: Simplify right side
    13,986.90x = 86,493,567.84
  5. Step 5: Solve for x
    x = 86,493,567.84/13,986.90
  6. Step 6: Final answer
    x = 6,183.90

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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.