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Finding the Fourth Proportional to 20,605.46, 30,909.27 and 6,755.54

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Solution

The fourth proportional to 20,605.46, 30,909.27 and 6,755.54 is: 10,133.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.46 : 30,909.27 = 6,755.54 : x
  2. Step 2: Convert to fraction form
    20,605.46/30,909.27 = 6,755.54/x
  3. Step 3: Cross multiply
    20,605.46x = 30,909.27 × 6,755.54
  4. Step 4: Simplify right side
    20,605.46x = 208,808,809.86
  5. Step 5: Solve for x
    x = 208,808,809.86/20,605.46
  6. Step 6: Final answer
    x = 10,133.66

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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.