Home / 7,687.08-11,531.31-3,988.32

Finding the Fourth Proportional to 7,687.08, 11,531.31 and 3,988.32

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Solution

The fourth proportional to 7,687.08, 11,531.31 and 3,988.32 is: 5,982.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,687.08 : 11,531.31 = 3,988.32 : x
  2. Step 2: Convert to fraction form
    7,687.08/11,531.31 = 3,988.32/x
  3. Step 3: Cross multiply
    7,687.08x = 11,531.31 × 3,988.32
  4. Step 4: Simplify right side
    7,687.08x = 45,990,476.70
  5. Step 5: Solve for x
    x = 45,990,476.70/7,687.08
  6. Step 6: Final answer
    x = 5,982.83

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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.