Home / 27,721.82-38,242.79-20,156.42

Finding the Fourth Proportional to 27,721.82, 38,242.79 and 20,156.42

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Solution

The fourth proportional to 27,721.82, 38,242.79 and 20,156.42 is: 27,806.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,721.82 : 38,242.79 = 20,156.42 : x
  2. Step 2: Convert to fraction form
    27,721.82/38,242.79 = 20,156.42/x
  3. Step 3: Cross multiply
    27,721.82x = 38,242.79 × 20,156.42
  4. Step 4: Simplify right side
    27,721.82x = 770,837,737.21
  5. Step 5: Solve for x
    x = 770,837,737.21/27,721.82
  6. Step 6: Final answer
    x = 27,806.17

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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.