Home / 20,811.44-28,719.48-11,859.44

Finding the Fourth Proportional to 20,811.44, 28,719.48 and 11,859.44

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Solution

The fourth proportional to 20,811.44, 28,719.48 and 11,859.44 is: 16,365.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.44 : 28,719.48 = 11,859.44 : x
  2. Step 2: Convert to fraction form
    20,811.44/28,719.48 = 11,859.44/x
  3. Step 3: Cross multiply
    20,811.44x = 28,719.48 × 11,859.44
  4. Step 4: Simplify right side
    20,811.44x = 340,596,949.89
  5. Step 5: Solve for x
    x = 340,596,949.89/20,811.44
  6. Step 6: Final answer
    x = 16,365.85

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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.