Home / 18,785.90-28,171.56-8,255.50

Finding the Fourth Proportional to 18,785.90, 28,171.56 and 8,255.50

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Solution

The fourth proportional to 18,785.90, 28,171.56 and 8,255.50 is: 12,380.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.90 : 28,171.56 = 8,255.50 : x
  2. Step 2: Convert to fraction form
    18,785.90/28,171.56 = 8,255.50/x
  3. Step 3: Cross multiply
    18,785.90x = 28,171.56 × 8,255.50
  4. Step 4: Simplify right side
    18,785.90x = 232,570,313.58
  5. Step 5: Solve for x
    x = 232,570,313.58/18,785.90
  6. Step 6: Final answer
    x = 12,380.05

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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.