Home / 20,137.57-27,788.90-11,185.61

Finding the Fourth Proportional to 20,137.57, 27,788.90 and 11,185.61

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Solution

The fourth proportional to 20,137.57, 27,788.90 and 11,185.61 is: 15,435.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,137.57 : 27,788.90 = 11,185.61 : x
  2. Step 2: Convert to fraction form
    20,137.57/27,788.90 = 11,185.61/x
  3. Step 3: Cross multiply
    20,137.57x = 27,788.90 × 11,185.61
  4. Step 4: Simplify right side
    20,137.57x = 310,835,811.27
  5. Step 5: Solve for x
    x = 310,835,811.27/20,137.57
  6. Step 6: Final answer
    x = 15,435.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.