Home / 20,824.08-28,736.64-11,392.56

Finding the Fourth Proportional to 20,824.08, 28,736.64 and 11,392.56

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Solution

The fourth proportional to 20,824.08, 28,736.64 and 11,392.56 is: 15,721.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,824.08 : 28,736.64 = 11,392.56 : x
  2. Step 2: Convert to fraction form
    20,824.08/28,736.64 = 11,392.56/x
  3. Step 3: Cross multiply
    20,824.08x = 28,736.64 × 11,392.56
  4. Step 4: Simplify right side
    20,824.08x = 327,383,895.40
  5. Step 5: Solve for x
    x = 327,383,895.40/20,824.08
  6. Step 6: Final answer
    x = 15,721.41

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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.