Home / 20,826.64-31,230.36-7,678.48

Finding the Fourth Proportional to 20,826.64, 31,230.36 and 7,678.48

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Solution

The fourth proportional to 20,826.64, 31,230.36 and 7,678.48 is: 11,514.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826.64 : 31,230.36 = 7,678.48 : x
  2. Step 2: Convert to fraction form
    20,826.64/31,230.36 = 7,678.48/x
  3. Step 3: Cross multiply
    20,826.64x = 31,230.36 × 7,678.48
  4. Step 4: Simplify right side
    20,826.64x = 239,801,694.65
  5. Step 5: Solve for x
    x = 239,801,694.65/20,826.64
  6. Step 6: Final answer
    x = 11,514.18

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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.