Home / 13,890.20-20,836.62-3,894.94

Finding the Fourth Proportional to 13,890.20, 20,836.62 and 3,894.94

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Solution

The fourth proportional to 13,890.20, 20,836.62 and 3,894.94 is: 5,842.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.20 : 20,836.62 = 3,894.94 : x
  2. Step 2: Convert to fraction form
    13,890.20/20,836.62 = 3,894.94/x
  3. Step 3: Cross multiply
    13,890.20x = 20,836.62 × 3,894.94
  4. Step 4: Simplify right side
    13,890.20x = 81,157,384.70
  5. Step 5: Solve for x
    x = 81,157,384.70/13,890.20
  6. Step 6: Final answer
    x = 5,842.78

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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.