Home / 18,518.20-27,757.86-13,321.24

Finding the Fourth Proportional to 18,518.20, 27,757.86 and 13,321.24

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Solution

The fourth proportional to 18,518.20, 27,757.86 and 13,321.24 is: 19,967.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,518.20 : 27,757.86 = 13,321.24 : x
  2. Step 2: Convert to fraction form
    18,518.20/27,757.86 = 13,321.24/x
  3. Step 3: Cross multiply
    18,518.20x = 27,757.86 × 13,321.24
  4. Step 4: Simplify right side
    18,518.20x = 369,769,114.95
  5. Step 5: Solve for x
    x = 369,769,114.95/18,518.20
  6. Step 6: Final answer
    x = 19,967.88

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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.