Home / 20,515,078.80-30,768,681.60-6,138,615.60

Finding the Fourth Proportional to 20,515,078.80, 30,768,681.60 and 6,138,615.60

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Solution

The fourth proportional to 20,515,078.80, 30,768,681.60 and 6,138,615.60 is: 9,206,745.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515,078.80 : 30,768,681.60 = 6,138,615.60 : x
  2. Step 2: Convert to fraction form
    20,515,078.80/30,768,681.60 = 6,138,615.60/x
  3. Step 3: Cross multiply
    20,515,078.80x = 30,768,681.60 × 6,138,615.60
  4. Step 4: Simplify right side
    20,515,078.80x = 188,877,108,861,192.97
  5. Step 5: Solve for x
    x = 188,877,108,861,192.97/20,515,078.80
  6. Step 6: Final answer
    x = 9,206,745.47

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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.