Home / 20,415,052.45-30,622,578.68-12,856,780.45

Finding the Fourth Proportional to 20,415,052.45, 30,622,578.68 and 12,856,780.45

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Solution

The fourth proportional to 20,415,052.45, 30,622,578.68 and 12,856,780.45 is: 19,285,170.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415,052.45 : 30,622,578.68 = 12,856,780.45 : x
  2. Step 2: Convert to fraction form
    20,415,052.45/30,622,578.68 = 12,856,780.45/x
  3. Step 3: Cross multiply
    20,415,052.45x = 30,622,578.68 × 12,856,780.45
  4. Step 4: Simplify right side
    20,415,052.45x = 393,707,770,901,610.75
  5. Step 5: Solve for x
    x = 393,707,770,901,610.75/20,415,052.45
  6. Step 6: Final answer
    x = 19,285,170.68

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Double scale
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Similar ratio
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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.