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Finding the Fourth Proportional to 27,161.21, 40,656.59 and 18,678.21

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Solution

The fourth proportional to 27,161.21, 40,656.59 and 18,678.21 is: 27,958.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,161.21 : 40,656.59 = 18,678.21 : x
  2. Step 2: Convert to fraction form
    27,161.21/40,656.59 = 18,678.21/x
  3. Step 3: Cross multiply
    27,161.21x = 40,656.59 × 18,678.21
  4. Step 4: Simplify right side
    27,161.21x = 759,392,325.90
  5. Step 5: Solve for x
    x = 759,392,325.90/27,161.21
  6. Step 6: Final answer
    x = 27,958.71

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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.