Home / 13,231.20-19,828.80-6,661.92

Finding the Fourth Proportional to 13,231.20, 19,828.80 and 6,661.92

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Solution

The fourth proportional to 13,231.20, 19,828.80 and 6,661.92 is: 9,983.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,231.20 : 19,828.80 = 6,661.92 : x
  2. Step 2: Convert to fraction form
    13,231.20/19,828.80 = 6,661.92/x
  3. Step 3: Cross multiply
    13,231.20x = 19,828.80 × 6,661.92
  4. Step 4: Simplify right side
    13,231.20x = 132,097,879.30
  5. Step 5: Solve for x
    x = 132,097,879.30/13,231.20
  6. Step 6: Final answer
    x = 9,983.82

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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.