Home / 7,309.80-10,961.50-2,115.56

Finding the Fourth Proportional to 7,309.80, 10,961.50 and 2,115.56

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Solution

The fourth proportional to 7,309.80, 10,961.50 and 2,115.56 is: 3,172.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,309.80 : 10,961.50 = 2,115.56 : x
  2. Step 2: Convert to fraction form
    7,309.80/10,961.50 = 2,115.56/x
  3. Step 3: Cross multiply
    7,309.80x = 10,961.50 × 2,115.56
  4. Step 4: Simplify right side
    7,309.80x = 23,189,710.94
  5. Step 5: Solve for x
    x = 23,189,710.94/7,309.80
  6. Step 6: Final answer
    x = 3,172.41

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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.