Home / 20,415,037.20-30,622,555.80-12,856,765.20

Finding the Fourth Proportional to 20,415,037.20, 30,622,555.80 and 12,856,765.20

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Solution

The fourth proportional to 20,415,037.20, 30,622,555.80 and 12,856,765.20 is: 19,285,147.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415,037.20 : 30,622,555.80 = 12,856,765.20 : x
  2. Step 2: Convert to fraction form
    20,415,037.20/30,622,555.80 = 12,856,765.20/x
  3. Step 3: Cross multiply
    20,415,037.20x = 30,622,555.80 × 12,856,765.20
  4. Step 4: Simplify right side
    20,415,037.20x = 393,707,009,744,498.12
  5. Step 5: Solve for x
    x = 393,707,009,744,498.12/20,415,037.20
  6. Step 6: Final answer
    x = 19,285,147.80

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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.