Home / 27,958.41-38,542.98-19,986.78

Finding the Fourth Proportional to 27,958.41, 38,542.98 and 19,986.78

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Solution

The fourth proportional to 27,958.41, 38,542.98 and 19,986.78 is: 27,553.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,958.41 : 38,542.98 = 19,986.78 : x
  2. Step 2: Convert to fraction form
    27,958.41/38,542.98 = 19,986.78/x
  3. Step 3: Cross multiply
    27,958.41x = 38,542.98 × 19,986.78
  4. Step 4: Simplify right side
    27,958.41x = 770,350,061.80
  5. Step 5: Solve for x
    x = 770,350,061.80/27,958.41
  6. Step 6: Final answer
    x = 27,553.43

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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.