Home / 7,890.34-11,829.26-3,939.56

Finding the Fourth Proportional to 7,890.34, 11,829.26 and 3,939.56

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Solution

The fourth proportional to 7,890.34, 11,829.26 and 3,939.56 is: 5,906.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.34 : 11,829.26 = 3,939.56 : x
  2. Step 2: Convert to fraction form
    7,890.34/11,829.26 = 3,939.56/x
  3. Step 3: Cross multiply
    7,890.34x = 11,829.26 × 3,939.56
  4. Step 4: Simplify right side
    7,890.34x = 46,602,079.53
  5. Step 5: Solve for x
    x = 46,602,079.53/7,890.34
  6. Step 6: Final answer
    x = 5,906.22

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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.