Home / 20,768.45-28,659.46-11,815.12

Finding the Fourth Proportional to 20,768.45, 28,659.46 and 11,815.12

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Solution

The fourth proportional to 20,768.45, 28,659.46 and 11,815.12 is: 16,304.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.45 : 28,659.46 = 11,815.12 : x
  2. Step 2: Convert to fraction form
    20,768.45/28,659.46 = 11,815.12/x
  3. Step 3: Cross multiply
    20,768.45x = 28,659.46 × 11,815.12
  4. Step 4: Simplify right side
    20,768.45x = 338,614,959.04
  5. Step 5: Solve for x
    x = 338,614,959.04/20,768.45
  6. Step 6: Final answer
    x = 16,304.30

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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.