Home / 3,990.09-5,979.66-2,038.20

Finding the Fourth Proportional to 3,990.09, 5,979.66 and 2,038.20

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Solution

The fourth proportional to 3,990.09, 5,979.66 and 2,038.20 is: 3,054.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.09 : 5,979.66 = 2,038.20 : x
  2. Step 2: Convert to fraction form
    3,990.09/5,979.66 = 2,038.20/x
  3. Step 3: Cross multiply
    3,990.09x = 5,979.66 × 2,038.20
  4. Step 4: Simplify right side
    3,990.09x = 12,187,743.01
  5. Step 5: Solve for x
    x = 12,187,743.01/3,990.09
  6. Step 6: Final answer
    x = 3,054.50

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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.