Home / 11,933.20-17,888.80-6,390.36

Finding the Fourth Proportional to 11,933.20, 17,888.80 and 6,390.36

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Solution

The fourth proportional to 11,933.20, 17,888.80 and 6,390.36 is: 9,579.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,933.20 : 17,888.80 = 6,390.36 : x
  2. Step 2: Convert to fraction form
    11,933.20/17,888.80 = 6,390.36/x
  3. Step 3: Cross multiply
    11,933.20x = 17,888.80 × 6,390.36
  4. Step 4: Simplify right side
    11,933.20x = 114,315,871.97
  5. Step 5: Solve for x
    x = 114,315,871.97/11,933.20
  6. Step 6: Final answer
    x = 9,579.65

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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.