Home / 20,190,336.20-30,285,504.30-12,128,179.40

Finding the Fourth Proportional to 20,190,336.20, 30,285,504.30 and 12,128,179.40

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Solution

The fourth proportional to 20,190,336.20, 30,285,504.30 and 12,128,179.40 is: 18,192,269.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190,336.20 : 30,285,504.30 = 12,128,179.40 : x
  2. Step 2: Convert to fraction form
    20,190,336.20/30,285,504.30 = 12,128,179.40/x
  3. Step 3: Cross multiply
    20,190,336.20x = 30,285,504.30 × 12,128,179.40
  4. Step 4: Simplify right side
    20,190,336.20x = 367,308,029,369,871.44
  5. Step 5: Solve for x
    x = 367,308,029,369,871.44/20,190,336.20
  6. Step 6: Final answer
    x = 18,192,269.10

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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.