Home / 8,190.14-12,270.52-4,978.60

Finding the Fourth Proportional to 8,190.14, 12,270.52 and 4,978.60

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Solution

The fourth proportional to 8,190.14, 12,270.52 and 4,978.60 is: 7,458.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,190.14 : 12,270.52 = 4,978.60 : x
  2. Step 2: Convert to fraction form
    8,190.14/12,270.52 = 4,978.60/x
  3. Step 3: Cross multiply
    8,190.14x = 12,270.52 × 4,978.60
  4. Step 4: Simplify right side
    8,190.14x = 61,090,010.87
  5. Step 5: Solve for x
    x = 61,090,010.87/8,190.14
  6. Step 6: Final answer
    x = 7,458.97

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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.