Home / 3,938-5,436.96-2,543.12

Finding the Fourth Proportional to 3,938, 5,436.96 and 2,543.12

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Solution

The fourth proportional to 3,938, 5,436.96 and 2,543.12 is: 3,511.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938 : 5,436.96 = 2,543.12 : x
  2. Step 2: Convert to fraction form
    3,938/5,436.96 = 2,543.12/x
  3. Step 3: Cross multiply
    3,938x = 5,436.96 × 2,543.12
  4. Step 4: Simplify right side
    3,938x = 13,826,841.72
  5. Step 5: Solve for x
    x = 13,826,841.72/3,938
  6. Step 6: Final answer
    x = 3,511.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.