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Finding the Fourth Proportional to 45,939.86, 68,912.15 and 12,659.19

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Solution

The fourth proportional to 45,939.86, 68,912.15 and 12,659.19 is: 18,989.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,939.86 : 68,912.15 = 12,659.19 : x
  2. Step 2: Convert to fraction form
    45,939.86/68,912.15 = 12,659.19/x
  3. Step 3: Cross multiply
    45,939.86x = 68,912.15 × 12,659.19
  4. Step 4: Simplify right side
    45,939.86x = 872,372,137.28
  5. Step 5: Solve for x
    x = 872,372,137.28/45,939.86
  6. Step 6: Final answer
    x = 18,989.44

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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.