Home / 20,415,028.70-30,622,543.05-12,856,756.70

Finding the Fourth Proportional to 20,415,028.70, 30,622,543.05 and 12,856,756.70

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Solution

The fourth proportional to 20,415,028.70, 30,622,543.05 and 12,856,756.70 is: 19,285,135.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415,028.70 : 30,622,543.05 = 12,856,756.70 : x
  2. Step 2: Convert to fraction form
    20,415,028.70/30,622,543.05 = 12,856,756.70/x
  3. Step 3: Cross multiply
    20,415,028.70x = 30,622,543.05 × 12,856,756.70
  4. Step 4: Simplify right side
    20,415,028.70x = 393,706,585,529,125.94
  5. Step 5: Solve for x
    x = 393,706,585,529,125.94/20,415,028.70
  6. Step 6: Final answer
    x = 19,285,135.05

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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.