Home / 7,940.80-11,911.14-3,320.56

Finding the Fourth Proportional to 7,940.80, 11,911.14 and 3,320.56

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Solution

The fourth proportional to 7,940.80, 11,911.14 and 3,320.56 is: 4,980.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,940.80 : 11,911.14 = 3,320.56 : x
  2. Step 2: Convert to fraction form
    7,940.80/11,911.14 = 3,320.56/x
  3. Step 3: Cross multiply
    7,940.80x = 11,911.14 × 3,320.56
  4. Step 4: Simplify right side
    7,940.80x = 39,551,655.04
  5. Step 5: Solve for x
    x = 39,551,655.04/7,940.80
  6. Step 6: Final answer
    x = 4,980.81

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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.