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Finding the Fourth Proportional to 47,399.20, 71,100 and 12,340.48

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Solution

The fourth proportional to 47,399.20, 71,100 and 12,340.48 is: 18,511.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,399.20 : 71,100 = 12,340.48 : x
  2. Step 2: Convert to fraction form
    47,399.20/71,100 = 12,340.48/x
  3. Step 3: Cross multiply
    47,399.20x = 71,100 × 12,340.48
  4. Step 4: Simplify right side
    47,399.20x = 877,408,128
  5. Step 5: Solve for x
    x = 877,408,128/47,399.20
  6. Step 6: Final answer
    x = 18,511.03

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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.