Home / 18,742.78-28,116-5,416.09

Finding the Fourth Proportional to 18,742.78, 28,116 and 5,416.09

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Solution

The fourth proportional to 18,742.78, 28,116 and 5,416.09 is: 8,124.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,742.78 : 28,116 = 5,416.09 : x
  2. Step 2: Convert to fraction form
    18,742.78/28,116 = 5,416.09/x
  3. Step 3: Cross multiply
    18,742.78x = 28,116 × 5,416.09
  4. Step 4: Simplify right side
    18,742.78x = 152,278,786.44
  5. Step 5: Solve for x
    x = 152,278,786.44/18,742.78
  6. Step 6: Final answer
    x = 8,124.66

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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.