Home / 12,685.23-19,028.75-3,919

Finding the Fourth Proportional to 12,685.23, 19,028.75 and 3,919

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Solution

The fourth proportional to 12,685.23, 19,028.75 and 3,919 is: 5,878.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.23 : 19,028.75 = 3,919 : x
  2. Step 2: Convert to fraction form
    12,685.23/19,028.75 = 3,919/x
  3. Step 3: Cross multiply
    12,685.23x = 19,028.75 × 3,919
  4. Step 4: Simplify right side
    12,685.23x = 74,573,671.25
  5. Step 5: Solve for x
    x = 74,573,671.25/12,685.23
  6. Step 6: Final answer
    x = 5,878.78

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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.