Home / 19,310.82-28,921.28-18,778.79

Finding the Fourth Proportional to 19,310.82, 28,921.28 and 18,778.79

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Solution

The fourth proportional to 19,310.82, 28,921.28 and 18,778.79 is: 28,124.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,310.82 : 28,921.28 = 18,778.79 : x
  2. Step 2: Convert to fraction form
    19,310.82/28,921.28 = 18,778.79/x
  3. Step 3: Cross multiply
    19,310.82x = 28,921.28 × 18,778.79
  4. Step 4: Simplify right side
    19,310.82x = 543,106,405.15
  5. Step 5: Solve for x
    x = 543,106,405.15/19,310.82
  6. Step 6: Final answer
    x = 28,124.46

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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.