Home / 7,321.20-10,976.40-3,157.80

Finding the Fourth Proportional to 7,321.20, 10,976.40 and 3,157.80

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Solution

The fourth proportional to 7,321.20, 10,976.40 and 3,157.80 is: 4,734.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.20 : 10,976.40 = 3,157.80 : x
  2. Step 2: Convert to fraction form
    7,321.20/10,976.40 = 3,157.80/x
  3. Step 3: Cross multiply
    7,321.20x = 10,976.40 × 3,157.80
  4. Step 4: Simplify right side
    7,321.20x = 34,661,275.92
  5. Step 5: Solve for x
    x = 34,661,275.92/7,321.20
  6. Step 6: Final answer
    x = 4,734.37

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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.