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Finding the Fourth Proportional to 20,561.92, 30,842.03 and 11,260.89

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Solution

The fourth proportional to 20,561.92, 30,842.03 and 11,260.89 is: 16,890.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.92 : 30,842.03 = 11,260.89 : x
  2. Step 2: Convert to fraction form
    20,561.92/30,842.03 = 11,260.89/x
  3. Step 3: Cross multiply
    20,561.92x = 30,842.03 × 11,260.89
  4. Step 4: Simplify right side
    20,561.92x = 347,308,735.36
  5. Step 5: Solve for x
    x = 347,308,735.36/20,561.92
  6. Step 6: Final answer
    x = 16,890.87

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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.