Home / 11,121.90-16,664.40-7,828.07

Finding the Fourth Proportional to 11,121.90, 16,664.40 and 7,828.07

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Solution

The fourth proportional to 11,121.90, 16,664.40 and 7,828.07 is: 11,729.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.90 : 16,664.40 = 7,828.07 : x
  2. Step 2: Convert to fraction form
    11,121.90/16,664.40 = 7,828.07/x
  3. Step 3: Cross multiply
    11,121.90x = 16,664.40 × 7,828.07
  4. Step 4: Simplify right side
    11,121.90x = 130,450,131.37
  5. Step 5: Solve for x
    x = 130,450,131.37/11,121.90
  6. Step 6: Final answer
    x = 11,729.12

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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.