Home / 20,190,644.70-30,285,967.05-12,128,487.90

Finding the Fourth Proportional to 20,190,644.70, 30,285,967.05 and 12,128,487.90

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Solution

The fourth proportional to 20,190,644.70, 30,285,967.05 and 12,128,487.90 is: 18,192,731.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190,644.70 : 30,285,967.05 = 12,128,487.90 : x
  2. Step 2: Convert to fraction form
    20,190,644.70/30,285,967.05 = 12,128,487.90/x
  3. Step 3: Cross multiply
    20,190,644.70x = 30,285,967.05 × 12,128,487.90
  4. Step 4: Simplify right side
    20,190,644.70x = 367,322,984,905,723.69
  5. Step 5: Solve for x
    x = 367,322,984,905,723.69/20,190,644.70
  6. Step 6: Final answer
    x = 18,192,731.85

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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.