Home / 7,990.51-11,989.23-4,288.42

Finding the Fourth Proportional to 7,990.51, 11,989.23 and 4,288.42

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Solution

The fourth proportional to 7,990.51, 11,989.23 and 4,288.42 is: 6,434.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.51 : 11,989.23 = 4,288.42 : x
  2. Step 2: Convert to fraction form
    7,990.51/11,989.23 = 4,288.42/x
  3. Step 3: Cross multiply
    7,990.51x = 11,989.23 × 4,288.42
  4. Step 4: Simplify right side
    7,990.51x = 51,414,839.00
  5. Step 5: Solve for x
    x = 51,414,839.00/7,990.51
  6. Step 6: Final answer
    x = 6,434.48

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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.