Home / 11,721.90-17,582.42-3,930.50

Finding the Fourth Proportional to 11,721.90, 17,582.42 and 3,930.50

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Solution

The fourth proportional to 11,721.90, 17,582.42 and 3,930.50 is: 5,895.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,721.90 : 17,582.42 = 3,930.50 : x
  2. Step 2: Convert to fraction form
    11,721.90/17,582.42 = 3,930.50/x
  3. Step 3: Cross multiply
    11,721.90x = 17,582.42 × 3,930.50
  4. Step 4: Simplify right side
    11,721.90x = 69,107,701.81
  5. Step 5: Solve for x
    x = 69,107,701.81/11,721.90
  6. Step 6: Final answer
    x = 5,895.61

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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.