Home / 7,678.38-11,517.09-3,779.34

Finding the Fourth Proportional to 7,678.38, 11,517.09 and 3,779.34

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Solution

The fourth proportional to 7,678.38, 11,517.09 and 3,779.34 is: 5,668.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,678.38 : 11,517.09 = 3,779.34 : x
  2. Step 2: Convert to fraction form
    7,678.38/11,517.09 = 3,779.34/x
  3. Step 3: Cross multiply
    7,678.38x = 11,517.09 × 3,779.34
  4. Step 4: Simplify right side
    7,678.38x = 43,526,998.92
  5. Step 5: Solve for x
    x = 43,526,998.92/7,678.38
  6. Step 6: Final answer
    x = 5,668.77

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1.5x scale

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.