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Finding the Fourth Proportional to 14,755.69, 20,362.85 and 8,131.69

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Solution

The fourth proportional to 14,755.69, 20,362.85 and 8,131.69 is: 11,221.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,755.69 : 20,362.85 = 8,131.69 : x
  2. Step 2: Convert to fraction form
    14,755.69/20,362.85 = 8,131.69/x
  3. Step 3: Cross multiply
    14,755.69x = 20,362.85 × 8,131.69
  4. Step 4: Simplify right side
    14,755.69x = 165,584,322.64
  5. Step 5: Solve for x
    x = 165,584,322.64/14,755.69
  6. Step 6: Final answer
    x = 11,221.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.