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Finding the Fourth Proportional to 7,231.60, 10,840.20 and 3,329.20

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Solution

The fourth proportional to 7,231.60, 10,840.20 and 3,329.20 is: 4,990.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,231.60 : 10,840.20 = 3,329.20 : x
  2. Step 2: Convert to fraction form
    7,231.60/10,840.20 = 3,329.20/x
  3. Step 3: Cross multiply
    7,231.60x = 10,840.20 × 3,329.20
  4. Step 4: Simplify right side
    7,231.60x = 36,089,193.84
  5. Step 5: Solve for x
    x = 36,089,193.84/7,231.60
  6. Step 6: Final answer
    x = 4,990.49

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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.