Home / 12,819.90-19,193.40-9,879.60

Finding the Fourth Proportional to 12,819.90, 19,193.40 and 9,879.60

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Solution

The fourth proportional to 12,819.90, 19,193.40 and 9,879.60 is: 14,791.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,819.90 : 19,193.40 = 9,879.60 : x
  2. Step 2: Convert to fraction form
    12,819.90/19,193.40 = 9,879.60/x
  3. Step 3: Cross multiply
    12,819.90x = 19,193.40 × 9,879.60
  4. Step 4: Simplify right side
    12,819.90x = 189,623,114.64
  5. Step 5: Solve for x
    x = 189,623,114.64/12,819.90
  6. Step 6: Final answer
    x = 14,791.31

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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.