Home / 28,239.82-42,361.74-8,519.88

Finding the Fourth Proportional to 28,239.82, 42,361.74 and 8,519.88

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Solution

The fourth proportional to 28,239.82, 42,361.74 and 8,519.88 is: 12,780.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.82 : 42,361.74 = 8,519.88 : x
  2. Step 2: Convert to fraction form
    28,239.82/42,361.74 = 8,519.88/x
  3. Step 3: Cross multiply
    28,239.82x = 42,361.74 × 8,519.88
  4. Step 4: Simplify right side
    28,239.82x = 360,916,941.39
  5. Step 5: Solve for x
    x = 360,916,941.39/28,239.82
  6. Step 6: Final answer
    x = 12,780.43

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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.