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Finding the Fourth Proportional to 45,940.56, 68,910.54 and 12,665.22

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Solution

The fourth proportional to 45,940.56, 68,910.54 and 12,665.22 is: 18,997.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,940.56 : 68,910.54 = 12,665.22 : x
  2. Step 2: Convert to fraction form
    45,940.56/68,910.54 = 12,665.22/x
  3. Step 3: Cross multiply
    45,940.56x = 68,910.54 × 12,665.22
  4. Step 4: Simplify right side
    45,940.56x = 872,767,149.42
  5. Step 5: Solve for x
    x = 872,767,149.42/45,940.56
  6. Step 6: Final answer
    x = 18,997.75

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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.