Home / 7,418.40-11,143.80-5,231.40

Finding the Fourth Proportional to 7,418.40, 11,143.80 and 5,231.40

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Solution

The fourth proportional to 7,418.40, 11,143.80 and 5,231.40 is: 7,858.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,418.40 : 11,143.80 = 5,231.40 : x
  2. Step 2: Convert to fraction form
    7,418.40/11,143.80 = 5,231.40/x
  3. Step 3: Cross multiply
    7,418.40x = 11,143.80 × 5,231.40
  4. Step 4: Simplify right side
    7,418.40x = 58,297,675.32
  5. Step 5: Solve for x
    x = 58,297,675.32/7,418.40
  6. Step 6: Final answer
    x = 7,858.52

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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.