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Finding the Fourth Proportional to 47,997.20, 71,974.20 and 18,405.20

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Solution

The fourth proportional to 47,997.20, 71,974.20 and 18,405.20 is: 27,599.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,997.20 : 71,974.20 = 18,405.20 : x
  2. Step 2: Convert to fraction form
    47,997.20/71,974.20 = 18,405.20/x
  3. Step 3: Cross multiply
    47,997.20x = 71,974.20 × 18,405.20
  4. Step 4: Simplify right side
    47,997.20x = 1,324,699,545.84
  5. Step 5: Solve for x
    x = 1,324,699,545.84/47,997.20
  6. Step 6: Final answer
    x = 27,599.52

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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.