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Finding the Fourth Proportional to 20,618.98, 30,944.87 and 7,475.10

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Solution

The fourth proportional to 20,618.98, 30,944.87 and 7,475.10 is: 11,218.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.98 : 30,944.87 = 7,475.10 : x
  2. Step 2: Convert to fraction form
    20,618.98/30,944.87 = 7,475.10/x
  3. Step 3: Cross multiply
    20,618.98x = 30,944.87 × 7,475.10
  4. Step 4: Simplify right side
    20,618.98x = 231,315,997.74
  5. Step 5: Solve for x
    x = 231,315,997.74/20,618.98
  6. Step 6: Final answer
    x = 11,218.60

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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.