Home / 20,692.20-28,555.68-11,260.75

Finding the Fourth Proportional to 20,692.20, 28,555.68 and 11,260.75

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Solution

The fourth proportional to 20,692.20, 28,555.68 and 11,260.75 is: 15,540.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.20 : 28,555.68 = 11,260.75 : x
  2. Step 2: Convert to fraction form
    20,692.20/28,555.68 = 11,260.75/x
  3. Step 3: Cross multiply
    20,692.20x = 28,555.68 × 11,260.75
  4. Step 4: Simplify right side
    20,692.20x = 321,558,373.56
  5. Step 5: Solve for x
    x = 321,558,373.56/20,692.20
  6. Step 6: Final answer
    x = 15,540.08

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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.