Home / 39,633.88-54,694.40-21,728.56

Finding the Fourth Proportional to 39,633.88, 54,694.40 and 21,728.56

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Solution

The fourth proportional to 39,633.88, 54,694.40 and 21,728.56 is: 29,985.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,633.88 : 54,694.40 = 21,728.56 : x
  2. Step 2: Convert to fraction form
    39,633.88/54,694.40 = 21,728.56/x
  3. Step 3: Cross multiply
    39,633.88x = 54,694.40 × 21,728.56
  4. Step 4: Simplify right side
    39,633.88x = 1,188,430,552.06
  5. Step 5: Solve for x
    x = 1,188,430,552.06/39,633.88
  6. Step 6: Final answer
    x = 29,985.22

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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.