Home / 39,638.72-54,703.04-21,735.20

Finding the Fourth Proportional to 39,638.72, 54,703.04 and 21,735.20

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Solution

The fourth proportional to 39,638.72, 54,703.04 and 21,735.20 is: 29,995.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,638.72 : 54,703.04 = 21,735.20 : x
  2. Step 2: Convert to fraction form
    39,638.72/54,703.04 = 21,735.20/x
  3. Step 3: Cross multiply
    39,638.72x = 54,703.04 × 21,735.20
  4. Step 4: Simplify right side
    39,638.72x = 1,188,981,515.01
  5. Step 5: Solve for x
    x = 1,188,981,515.01/39,638.72
  6. Step 6: Final answer
    x = 29,995.46

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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.