Home / 20,125,978.90-30,188,968.35-4,979,910.40

Finding the Fourth Proportional to 20,125,978.90, 30,188,968.35 and 4,979,910.40

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Solution

The fourth proportional to 20,125,978.90, 30,188,968.35 and 4,979,910.40 is: 7,469,865.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125,978.90 : 30,188,968.35 = 4,979,910.40 : x
  2. Step 2: Convert to fraction form
    20,125,978.90/30,188,968.35 = 4,979,910.40/x
  3. Step 3: Cross multiply
    20,125,978.90x = 30,188,968.35 × 4,979,910.40
  4. Step 4: Simplify right side
    20,125,978.90x = 150,338,357,451,435.84
  5. Step 5: Solve for x
    x = 150,338,357,451,435.84/20,125,978.90
  6. Step 6: Final answer
    x = 7,469,865.60

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1.5x scale

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.