Home / 13,840.92-20,760.68-3,980.10

Finding the Fourth Proportional to 13,840.92, 20,760.68 and 3,980.10

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Solution

The fourth proportional to 13,840.92, 20,760.68 and 3,980.10 is: 5,969.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.92 : 20,760.68 = 3,980.10 : x
  2. Step 2: Convert to fraction form
    13,840.92/20,760.68 = 3,980.10/x
  3. Step 3: Cross multiply
    13,840.92x = 20,760.68 × 3,980.10
  4. Step 4: Simplify right side
    13,840.92x = 82,629,582.47
  5. Step 5: Solve for x
    x = 82,629,582.47/13,840.92
  6. Step 6: Final answer
    x = 5,969.95

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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.