Home / 6,623.85-9,141.09-3,639.78

Finding the Fourth Proportional to 6,623.85, 9,141.09 and 3,639.78

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Solution

The fourth proportional to 6,623.85, 9,141.09 and 3,639.78 is: 5,022.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,623.85 : 9,141.09 = 3,639.78 : x
  2. Step 2: Convert to fraction form
    6,623.85/9,141.09 = 3,639.78/x
  3. Step 3: Cross multiply
    6,623.85x = 9,141.09 × 3,639.78
  4. Step 4: Simplify right side
    6,623.85x = 33,271,556.56
  5. Step 5: Solve for x
    x = 33,271,556.56/6,623.85
  6. Step 6: Final answer
    x = 5,022.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.