Home / 5,179.09-7,145.00-2,939.12

Finding the Fourth Proportional to 5,179.09, 7,145.00 and 2,939.12

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Solution

The fourth proportional to 5,179.09, 7,145.00 and 2,939.12 is: 4,054.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.09 : 7,145.00 = 2,939.12 : x
  2. Step 2: Convert to fraction form
    5,179.09/7,145.00 = 2,939.12/x
  3. Step 3: Cross multiply
    5,179.09x = 7,145.00 × 2,939.12
  4. Step 4: Simplify right side
    5,179.09x = 21,000,025.80
  5. Step 5: Solve for x
    x = 21,000,025.80/5,179.09
  6. Step 6: Final answer
    x = 4,054.77

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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.