Home / 18,380.13-27,570.19-7,991.88

Finding the Fourth Proportional to 18,380.13, 27,570.19 and 7,991.88

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Solution

The fourth proportional to 18,380.13, 27,570.19 and 7,991.88 is: 11,987.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,380.13 : 27,570.19 = 7,991.88 : x
  2. Step 2: Convert to fraction form
    18,380.13/27,570.19 = 7,991.88/x
  3. Step 3: Cross multiply
    18,380.13x = 27,570.19 × 7,991.88
  4. Step 4: Simplify right side
    18,380.13x = 220,337,650.06
  5. Step 5: Solve for x
    x = 220,337,650.06/18,380.13
  6. Step 6: Final answer
    x = 11,987.82

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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.