Home / 7,986.36-11,985.78-5,538.42

Finding the Fourth Proportional to 7,986.36, 11,985.78 and 5,538.42

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Solution

The fourth proportional to 7,986.36, 11,985.78 and 5,538.42 is: 8,311.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,986.36 : 11,985.78 = 5,538.42 : x
  2. Step 2: Convert to fraction form
    7,986.36/11,985.78 = 5,538.42/x
  3. Step 3: Cross multiply
    7,986.36x = 11,985.78 × 5,538.42
  4. Step 4: Simplify right side
    7,986.36x = 66,382,283.67
  5. Step 5: Solve for x
    x = 66,382,283.67/7,986.36
  6. Step 6: Final answer
    x = 8,311.96

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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.