Home / 5,195.20-7,792.80-3,121.60

Finding the Fourth Proportional to 5,195.20, 7,792.80 and 3,121.60

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Solution

The fourth proportional to 5,195.20, 7,792.80 and 3,121.60 is: 4,682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,195.20 : 7,792.80 = 3,121.60 : x
  2. Step 2: Convert to fraction form
    5,195.20/7,792.80 = 3,121.60/x
  3. Step 3: Cross multiply
    5,195.20x = 7,792.80 × 3,121.60
  4. Step 4: Simplify right side
    5,195.20x = 24,326,004.48
  5. Step 5: Solve for x
    x = 24,326,004.48/5,195.20
  6. Step 6: Final answer
    x = 4,682.40

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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.