Home / 20,692.88-28,556.18-11,261.51

Finding the Fourth Proportional to 20,692.88, 28,556.18 and 11,261.51

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Solution

The fourth proportional to 20,692.88, 28,556.18 and 11,261.51 is: 15,540.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,692.88 : 28,556.18 = 11,261.51 : x
  2. Step 2: Convert to fraction form
    20,692.88/28,556.18 = 11,261.51/x
  3. Step 3: Cross multiply
    20,692.88x = 28,556.18 × 11,261.51
  4. Step 4: Simplify right side
    20,692.88x = 321,585,507.54
  5. Step 5: Solve for x
    x = 321,585,507.54/20,692.88
  6. Step 6: Final answer
    x = 15,540.88

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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.