Home / 11,917.92-17,871.33-4,421.18

Finding the Fourth Proportional to 11,917.92, 17,871.33 and 4,421.18

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Solution

The fourth proportional to 11,917.92, 17,871.33 and 4,421.18 is: 6,629.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,917.92 : 17,871.33 = 4,421.18 : x
  2. Step 2: Convert to fraction form
    11,917.92/17,871.33 = 4,421.18/x
  3. Step 3: Cross multiply
    11,917.92x = 17,871.33 × 4,421.18
  4. Step 4: Simplify right side
    11,917.92x = 79,012,428.03
  5. Step 5: Solve for x
    x = 79,012,428.03/11,917.92
  6. Step 6: Final answer
    x = 6,629.71

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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.