Home / 13,840.56-20,760.72-3,979.80

Finding the Fourth Proportional to 13,840.56, 20,760.72 and 3,979.80

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Solution

The fourth proportional to 13,840.56, 20,760.72 and 3,979.80 is: 5,969.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.56 : 20,760.72 = 3,979.80 : x
  2. Step 2: Convert to fraction form
    13,840.56/20,760.72 = 3,979.80/x
  3. Step 3: Cross multiply
    13,840.56x = 20,760.72 × 3,979.80
  4. Step 4: Simplify right side
    13,840.56x = 82,623,513.46
  5. Step 5: Solve for x
    x = 82,623,513.46/13,840.56
  6. Step 6: Final answer
    x = 5,969.67

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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.