Home / 20,431.04-28,189.82-11,928.33

Finding the Fourth Proportional to 20,431.04, 28,189.82 and 11,928.33

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Solution

The fourth proportional to 20,431.04, 28,189.82 and 11,928.33 is: 16,458.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.04 : 28,189.82 = 11,928.33 : x
  2. Step 2: Convert to fraction form
    20,431.04/28,189.82 = 11,928.33/x
  3. Step 3: Cross multiply
    20,431.04x = 28,189.82 × 11,928.33
  4. Step 4: Simplify right side
    20,431.04x = 336,257,505.42
  5. Step 5: Solve for x
    x = 336,257,505.42/20,431.04
  6. Step 6: Final answer
    x = 16,458.17

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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.