Home / 20,768.72-28,660.47-11,816.03

Finding the Fourth Proportional to 20,768.72, 28,660.47 and 11,816.03

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Solution

The fourth proportional to 20,768.72, 28,660.47 and 11,816.03 is: 16,305.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.72 : 28,660.47 = 11,816.03 : x
  2. Step 2: Convert to fraction form
    20,768.72/28,660.47 = 11,816.03/x
  3. Step 3: Cross multiply
    20,768.72x = 28,660.47 × 11,816.03
  4. Step 4: Simplify right side
    20,768.72x = 338,653,080.81
  5. Step 5: Solve for x
    x = 338,653,080.81/20,768.72
  6. Step 6: Final answer
    x = 16,305.92

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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.