Home / 20,682.30-28,532.34-13,965.78

Finding the Fourth Proportional to 20,682.30, 28,532.34 and 13,965.78

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Solution

The fourth proportional to 20,682.30, 28,532.34 and 13,965.78 is: 19,266.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,682.30 : 28,532.34 = 13,965.78 : x
  2. Step 2: Convert to fraction form
    20,682.30/28,532.34 = 13,965.78/x
  3. Step 3: Cross multiply
    20,682.30x = 28,532.34 × 13,965.78
  4. Step 4: Simplify right side
    20,682.30x = 398,476,383.33
  5. Step 5: Solve for x
    x = 398,476,383.33/20,682.30
  6. Step 6: Final answer
    x = 19,266.54

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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.