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Finding the Fourth Proportional to 47,939.43, 71,909.11 and 12,879.07

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Solution

The fourth proportional to 47,939.43, 71,909.11 and 12,879.07 is: 19,318.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,939.43 : 71,909.11 = 12,879.07 : x
  2. Step 2: Convert to fraction form
    47,939.43/71,909.11 = 12,879.07/x
  3. Step 3: Cross multiply
    47,939.43x = 71,909.11 × 12,879.07
  4. Step 4: Simplify right side
    47,939.43x = 926,122,461.33
  5. Step 5: Solve for x
    x = 926,122,461.33/47,939.43
  6. Step 6: Final answer
    x = 19,318.60

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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.