Home / 7,438.20-11,135.70-7,222.20

Finding the Fourth Proportional to 7,438.20, 11,135.70 and 7,222.20

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Solution

The fourth proportional to 7,438.20, 11,135.70 and 7,222.20 is: 10,812.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,438.20 : 11,135.70 = 7,222.20 : x
  2. Step 2: Convert to fraction form
    7,438.20/11,135.70 = 7,222.20/x
  3. Step 3: Cross multiply
    7,438.20x = 11,135.70 × 7,222.20
  4. Step 4: Simplify right side
    7,438.20x = 80,424,252.54
  5. Step 5: Solve for x
    x = 80,424,252.54/7,438.20
  6. Step 6: Final answer
    x = 10,812.33

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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.