Home / 20,859.20-28,786.43-11,427.77

Finding the Fourth Proportional to 20,859.20, 28,786.43 and 11,427.77

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Solution

The fourth proportional to 20,859.20, 28,786.43 and 11,427.77 is: 15,770.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.20 : 28,786.43 = 11,427.77 : x
  2. Step 2: Convert to fraction form
    20,859.20/28,786.43 = 11,427.77/x
  3. Step 3: Cross multiply
    20,859.20x = 28,786.43 × 11,427.77
  4. Step 4: Simplify right side
    20,859.20x = 328,964,585.80
  5. Step 5: Solve for x
    x = 328,964,585.80/20,859.20
  6. Step 6: Final answer
    x = 15,770.72

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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.