Home / 20,824.16-28,736.80-11,392.80

Finding the Fourth Proportional to 20,824.16, 28,736.80 and 11,392.80

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Solution

The fourth proportional to 20,824.16, 28,736.80 and 11,392.80 is: 15,721.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,824.16 : 28,736.80 = 11,392.80 : x
  2. Step 2: Convert to fraction form
    20,824.16/28,736.80 = 11,392.80/x
  3. Step 3: Cross multiply
    20,824.16x = 28,736.80 × 11,392.80
  4. Step 4: Simplify right side
    20,824.16x = 327,392,615.04
  5. Step 5: Solve for x
    x = 327,392,615.04/20,824.16
  6. Step 6: Final answer
    x = 15,721.77

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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.