Home / 20,125,979.40-30,188,969.10-4,979,910.90

Finding the Fourth Proportional to 20,125,979.40, 30,188,969.10 and 4,979,910.90

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Solution

The fourth proportional to 20,125,979.40, 30,188,969.10 and 4,979,910.90 is: 7,469,866.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125,979.40 : 30,188,969.10 = 4,979,910.90 : x
  2. Step 2: Convert to fraction form
    20,125,979.40/30,188,969.10 = 4,979,910.90/x
  3. Step 3: Cross multiply
    20,125,979.40x = 30,188,969.10 × 4,979,910.90
  4. Step 4: Simplify right side
    20,125,979.40x = 150,338,376,280,853.22
  5. Step 5: Solve for x
    x = 150,338,376,280,853.22/20,125,979.40
  6. Step 6: Final answer
    x = 7,469,866.35

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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.