Home / 11,918.24-17,871.84-6,989.36

Finding the Fourth Proportional to 11,918.24, 17,871.84 and 6,989.36

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Solution

The fourth proportional to 11,918.24, 17,871.84 and 6,989.36 is: 10,480.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,918.24 : 17,871.84 = 6,989.36 : x
  2. Step 2: Convert to fraction form
    11,918.24/17,871.84 = 6,989.36/x
  3. Step 3: Cross multiply
    11,918.24x = 17,871.84 × 6,989.36
  4. Step 4: Simplify right side
    11,918.24x = 124,912,723.62
  5. Step 5: Solve for x
    x = 124,912,723.62/11,918.24
  6. Step 6: Final answer
    x = 10,480.80

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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.