Home / 2,638.38-3,957.93-2,155.62

Finding the Fourth Proportional to 2,638.38, 3,957.93 and 2,155.62

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Solution

The fourth proportional to 2,638.38, 3,957.93 and 2,155.62 is: 3,233.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638.38 : 3,957.93 = 2,155.62 : x
  2. Step 2: Convert to fraction form
    2,638.38/3,957.93 = 2,155.62/x
  3. Step 3: Cross multiply
    2,638.38x = 3,957.93 × 2,155.62
  4. Step 4: Simplify right side
    2,638.38x = 8,531,793.07
  5. Step 5: Solve for x
    x = 8,531,793.07/2,638.38
  6. Step 6: Final answer
    x = 3,233.72

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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.