Home / 20,824.20-28,737.36-11,392.74

Finding the Fourth Proportional to 20,824.20, 28,737.36 and 11,392.74

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Solution

The fourth proportional to 20,824.20, 28,737.36 and 11,392.74 is: 15,721.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,824.20 : 28,737.36 = 11,392.74 : x
  2. Step 2: Convert to fraction form
    20,824.20/28,737.36 = 11,392.74/x
  3. Step 3: Cross multiply
    20,824.20x = 28,737.36 × 11,392.74
  4. Step 4: Simplify right side
    20,824.20x = 327,397,270.77
  5. Step 5: Solve for x
    x = 327,397,270.77/20,824.20
  6. Step 6: Final answer
    x = 15,721.96

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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.