Home / 20,086.38-30,117.42-8,991.00

Finding the Fourth Proportional to 20,086.38, 30,117.42 and 8,991.00

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Solution

The fourth proportional to 20,086.38, 30,117.42 and 8,991.00 is: 13,481.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,086.38 : 30,117.42 = 8,991.00 : x
  2. Step 2: Convert to fraction form
    20,086.38/30,117.42 = 8,991.00/x
  3. Step 3: Cross multiply
    20,086.38x = 30,117.42 × 8,991.00
  4. Step 4: Simplify right side
    20,086.38x = 270,785,633.03
  5. Step 5: Solve for x
    x = 270,785,633.03/20,086.38
  6. Step 6: Final answer
    x = 13,481.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.