Home / 28,157,037.60-42,235,556.40-11,978,923.80

Finding the Fourth Proportional to 28,157,037.60, 42,235,556.40 and 11,978,923.80

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Solution

The fourth proportional to 28,157,037.60, 42,235,556.40 and 11,978,923.80 is: 17,968,385.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157,037.60 : 42,235,556.40 = 11,978,923.80 : x
  2. Step 2: Convert to fraction form
    28,157,037.60/42,235,556.40 = 11,978,923.80/x
  3. Step 3: Cross multiply
    28,157,037.60x = 42,235,556.40 × 11,978,923.80
  4. Step 4: Simplify right side
    28,157,037.60x = 505,936,511,766,202.31
  5. Step 5: Solve for x
    x = 505,936,511,766,202.31/28,157,037.60
  6. Step 6: Final answer
    x = 17,968,385.70

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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.