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Finding the Fourth Proportional to 18,159.20, 27,249.68 and 7,770.96

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Solution

The fourth proportional to 18,159.20, 27,249.68 and 7,770.96 is: 11,661.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,159.20 : 27,249.68 = 7,770.96 : x
  2. Step 2: Convert to fraction form
    18,159.20/27,249.68 = 7,770.96/x
  3. Step 3: Cross multiply
    18,159.20x = 27,249.68 × 7,770.96
  4. Step 4: Simplify right side
    18,159.20x = 211,756,173.29
  5. Step 5: Solve for x
    x = 211,756,173.29/18,159.20
  6. Step 6: Final answer
    x = 11,661.10

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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.