Home / 7,990.56-11,985.03-2,147.76

Finding the Fourth Proportional to 7,990.56, 11,985.03 and 2,147.76

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Solution

The fourth proportional to 7,990.56, 11,985.03 and 2,147.76 is: 3,221.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.56 : 11,985.03 = 2,147.76 : x
  2. Step 2: Convert to fraction form
    7,990.56/11,985.03 = 2,147.76/x
  3. Step 3: Cross multiply
    7,990.56x = 11,985.03 × 2,147.76
  4. Step 4: Simplify right side
    7,990.56x = 25,740,968.03
  5. Step 5: Solve for x
    x = 25,740,968.03/7,990.56
  6. Step 6: Final answer
    x = 3,221.42

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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.