Home / 7,828.79-11,743.19-2,638.31

Finding the Fourth Proportional to 7,828.79, 11,743.19 and 2,638.31

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Solution

The fourth proportional to 7,828.79, 11,743.19 and 2,638.31 is: 3,957.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,828.79 : 11,743.19 = 2,638.31 : x
  2. Step 2: Convert to fraction form
    7,828.79/11,743.19 = 2,638.31/x
  3. Step 3: Cross multiply
    7,828.79x = 11,743.19 × 2,638.31
  4. Step 4: Simplify right side
    7,828.79x = 30,982,103.70
  5. Step 5: Solve for x
    x = 30,982,103.70/7,828.79
  6. Step 6: Final answer
    x = 3,957.46

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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.