Home / 7,280.67-10,911.87-3,115.78

Finding the Fourth Proportional to 7,280.67, 10,911.87 and 3,115.78

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Solution

The fourth proportional to 7,280.67, 10,911.87 and 3,115.78 is: 4,669.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,280.67 : 10,911.87 = 3,115.78 : x
  2. Step 2: Convert to fraction form
    7,280.67/10,911.87 = 3,115.78/x
  3. Step 3: Cross multiply
    7,280.67x = 10,911.87 × 3,115.78
  4. Step 4: Simplify right side
    7,280.67x = 33,998,986.31
  5. Step 5: Solve for x
    x = 33,998,986.31/7,280.67
  6. Step 6: Final answer
    x = 4,669.76

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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.