Home / 13,121.60-19,682.40-3,260.80

Finding the Fourth Proportional to 13,121.60, 19,682.40 and 3,260.80

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Solution

The fourth proportional to 13,121.60, 19,682.40 and 3,260.80 is: 4,891.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.60 : 19,682.40 = 3,260.80 : x
  2. Step 2: Convert to fraction form
    13,121.60/19,682.40 = 3,260.80/x
  3. Step 3: Cross multiply
    13,121.60x = 19,682.40 × 3,260.80
  4. Step 4: Simplify right side
    13,121.60x = 64,180,369.92
  5. Step 5: Solve for x
    x = 64,180,369.92/13,121.60
  6. Step 6: Final answer
    x = 4,891.20

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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.