Home / 7,939.49-11,905.38-2,391.80

Finding the Fourth Proportional to 7,939.49, 11,905.38 and 2,391.80

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Solution

The fourth proportional to 7,939.49, 11,905.38 and 2,391.80 is: 3,586.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,939.49 : 11,905.38 = 2,391.80 : x
  2. Step 2: Convert to fraction form
    7,939.49/11,905.38 = 2,391.80/x
  3. Step 3: Cross multiply
    7,939.49x = 11,905.38 × 2,391.80
  4. Step 4: Simplify right side
    7,939.49x = 28,475,264.10
  5. Step 5: Solve for x
    x = 28,475,264.10/7,939.49
  6. Step 6: Final answer
    x = 3,586.54

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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.