Home / 20,811.68-28,722.93-11,738.90

Finding the Fourth Proportional to 20,811.68, 28,722.93 and 11,738.90

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Solution

The fourth proportional to 20,811.68, 28,722.93 and 11,738.90 is: 16,201.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.68 : 28,722.93 = 11,738.90 : x
  2. Step 2: Convert to fraction form
    20,811.68/28,722.93 = 11,738.90/x
  3. Step 3: Cross multiply
    20,811.68x = 28,722.93 × 11,738.90
  4. Step 4: Simplify right side
    20,811.68x = 337,175,696.79
  5. Step 5: Solve for x
    x = 337,175,696.79/20,811.68
  6. Step 6: Final answer
    x = 16,201.27

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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.