Home / 20,383.46-28,130.39-11,431.46

Finding the Fourth Proportional to 20,383.46, 28,130.39 and 11,431.46

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Solution

The fourth proportional to 20,383.46, 28,130.39 and 11,431.46 is: 15,776.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.46 : 28,130.39 = 11,431.46 : x
  2. Step 2: Convert to fraction form
    20,383.46/28,130.39 = 11,431.46/x
  3. Step 3: Cross multiply
    20,383.46x = 28,130.39 × 11,431.46
  4. Step 4: Simplify right side
    20,383.46x = 321,571,230.26
  5. Step 5: Solve for x
    x = 321,571,230.26/20,383.46
  6. Step 6: Final answer
    x = 15,776.09

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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.