Home / 39,639.82-54,702.55-21,734.78

Finding the Fourth Proportional to 39,639.82, 54,702.55 and 21,734.78

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Solution

The fourth proportional to 39,639.82, 54,702.55 and 21,734.78 is: 29,993.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,639.82 : 54,702.55 = 21,734.78 : x
  2. Step 2: Convert to fraction form
    39,639.82/54,702.55 = 21,734.78/x
  3. Step 3: Cross multiply
    39,639.82x = 54,702.55 × 21,734.78
  4. Step 4: Simplify right side
    39,639.82x = 1,188,947,889.69
  5. Step 5: Solve for x
    x = 1,188,947,889.69/39,639.82
  6. Step 6: Final answer
    x = 29,993.78

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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.