Home / 7,990.38-11,984.22-2,145.69

Finding the Fourth Proportional to 7,990.38, 11,984.22 and 2,145.69

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Solution

The fourth proportional to 7,990.38, 11,984.22 and 2,145.69 is: 3,218.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.38 : 11,984.22 = 2,145.69 : x
  2. Step 2: Convert to fraction form
    7,990.38/11,984.22 = 2,145.69/x
  3. Step 3: Cross multiply
    7,990.38x = 11,984.22 × 2,145.69
  4. Step 4: Simplify right side
    7,990.38x = 25,714,421.01
  5. Step 5: Solve for x
    x = 25,714,421.01/7,990.38
  6. Step 6: Final answer
    x = 3,218.17

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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.