Home / 28,721.52-43,012.26-20,361.78

Finding the Fourth Proportional to 28,721.52, 43,012.26 and 20,361.78

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Solution

The fourth proportional to 28,721.52, 43,012.26 and 20,361.78 is: 30,493.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,721.52 : 43,012.26 = 20,361.78 : x
  2. Step 2: Convert to fraction form
    28,721.52/43,012.26 = 20,361.78/x
  3. Step 3: Cross multiply
    28,721.52x = 43,012.26 × 20,361.78
  4. Step 4: Simplify right side
    28,721.52x = 875,806,175.42
  5. Step 5: Solve for x
    x = 875,806,175.42/28,721.52
  6. Step 6: Final answer
    x = 30,493.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.