Home / 20,823.82-28,736.90-11,392.38

Finding the Fourth Proportional to 20,823.82, 28,736.90 and 11,392.38

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Solution

The fourth proportional to 20,823.82, 28,736.90 and 11,392.38 is: 15,721.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.82 : 28,736.90 = 11,392.38 : x
  2. Step 2: Convert to fraction form
    20,823.82/28,736.90 = 11,392.38/x
  3. Step 3: Cross multiply
    20,823.82x = 28,736.90 × 11,392.38
  4. Step 4: Simplify right side
    20,823.82x = 327,381,684.82
  5. Step 5: Solve for x
    x = 327,381,684.82/20,823.82
  6. Step 6: Final answer
    x = 15,721.50

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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.