Home / 5,415.20-8,106.60-3,222.80

Finding the Fourth Proportional to 5,415.20, 8,106.60 and 3,222.80

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Solution

The fourth proportional to 5,415.20, 8,106.60 and 3,222.80 is: 4,824.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.20 : 8,106.60 = 3,222.80 : x
  2. Step 2: Convert to fraction form
    5,415.20/8,106.60 = 3,222.80/x
  3. Step 3: Cross multiply
    5,415.20x = 8,106.60 × 3,222.80
  4. Step 4: Simplify right side
    5,415.20x = 26,125,950.48
  5. Step 5: Solve for x
    x = 26,125,950.48/5,415.20
  6. Step 6: Final answer
    x = 4,824.56

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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.