Home / 18,971.88-28,455.15-11,930.43

Finding the Fourth Proportional to 18,971.88, 28,455.15 and 11,930.43

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Solution

The fourth proportional to 18,971.88, 28,455.15 and 11,930.43 is: 17,893.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,971.88 : 28,455.15 = 11,930.43 : x
  2. Step 2: Convert to fraction form
    18,971.88/28,455.15 = 11,930.43/x
  3. Step 3: Cross multiply
    18,971.88x = 28,455.15 × 11,930.43
  4. Step 4: Simplify right side
    18,971.88x = 339,482,059.48
  5. Step 5: Solve for x
    x = 339,482,059.48/18,971.88
  6. Step 6: Final answer
    x = 17,893.96

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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.