Home / 7,991.40-11,986.02-2,148.36

Finding the Fourth Proportional to 7,991.40, 11,986.02 and 2,148.36

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Solution

The fourth proportional to 7,991.40, 11,986.02 and 2,148.36 is: 3,222.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.40 : 11,986.02 = 2,148.36 : x
  2. Step 2: Convert to fraction form
    7,991.40/11,986.02 = 2,148.36/x
  3. Step 3: Cross multiply
    7,991.40x = 11,986.02 × 2,148.36
  4. Step 4: Simplify right side
    7,991.40x = 25,750,285.93
  5. Step 5: Solve for x
    x = 25,750,285.93/7,991.40
  6. Step 6: Final answer
    x = 3,222.25

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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.