Home / 39,640.79-54,704.16-21,735.34

Finding the Fourth Proportional to 39,640.79, 54,704.16 and 21,735.34

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Solution

The fourth proportional to 39,640.79, 54,704.16 and 21,735.34 is: 29,994.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,640.79 : 54,704.16 = 21,735.34 : x
  2. Step 2: Convert to fraction form
    39,640.79/54,704.16 = 21,735.34/x
  3. Step 3: Cross multiply
    39,640.79x = 54,704.16 × 21,735.34
  4. Step 4: Simplify right side
    39,640.79x = 1,189,013,380.25
  5. Step 5: Solve for x
    x = 1,189,013,380.25/39,640.79
  6. Step 6: Final answer
    x = 29,994.69

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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.