Home / 39,639.72-54,702.39-21,734.68

Finding the Fourth Proportional to 39,639.72, 54,702.39 and 21,734.68

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Solution

The fourth proportional to 39,639.72, 54,702.39 and 21,734.68 is: 29,993.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,639.72 : 54,702.39 = 21,734.68 : x
  2. Step 2: Convert to fraction form
    39,639.72/54,702.39 = 21,734.68/x
  3. Step 3: Cross multiply
    39,639.72x = 54,702.39 × 21,734.68
  4. Step 4: Simplify right side
    39,639.72x = 1,188,938,941.89
  5. Step 5: Solve for x
    x = 1,188,938,941.89/39,639.72
  6. Step 6: Final answer
    x = 29,993.63

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1.5x scale

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.