Home / 8,578.40-12,868.20-3,383.60

Finding the Fourth Proportional to 8,578.40, 12,868.20 and 3,383.60

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Solution

The fourth proportional to 8,578.40, 12,868.20 and 3,383.60 is: 5,075.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,578.40 : 12,868.20 = 3,383.60 : x
  2. Step 2: Convert to fraction form
    8,578.40/12,868.20 = 3,383.60/x
  3. Step 3: Cross multiply
    8,578.40x = 12,868.20 × 3,383.60
  4. Step 4: Simplify right side
    8,578.40x = 43,540,841.52
  5. Step 5: Solve for x
    x = 43,540,841.52/8,578.40
  6. Step 6: Final answer
    x = 5,075.64

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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.