Home / 13,986.35-20,979.53-11,515.98

Finding the Fourth Proportional to 13,986.35, 20,979.53 and 11,515.98

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Solution

The fourth proportional to 13,986.35, 20,979.53 and 11,515.98 is: 17,273.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.35 : 20,979.53 = 11,515.98 : x
  2. Step 2: Convert to fraction form
    13,986.35/20,979.53 = 11,515.98/x
  3. Step 3: Cross multiply
    13,986.35x = 20,979.53 × 11,515.98
  4. Step 4: Simplify right side
    13,986.35x = 241,599,847.89
  5. Step 5: Solve for x
    x = 241,599,847.89/13,986.35
  6. Step 6: Final answer
    x = 17,273.97

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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.