Home / 18,520.04-27,780.58-8,129.40

Finding the Fourth Proportional to 18,520.04, 27,780.58 and 8,129.40

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Solution

The fourth proportional to 18,520.04, 27,780.58 and 8,129.40 is: 12,194.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,520.04 : 27,780.58 = 8,129.40 : x
  2. Step 2: Convert to fraction form
    18,520.04/27,780.58 = 8,129.40/x
  3. Step 3: Cross multiply
    18,520.04x = 27,780.58 × 8,129.40
  4. Step 4: Simplify right side
    18,520.04x = 225,839,447.05
  5. Step 5: Solve for x
    x = 225,839,447.05/18,520.04
  6. Step 6: Final answer
    x = 12,194.33

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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.