Home / 8,128.15-12,191.35-5,512.44

Finding the Fourth Proportional to 8,128.15, 12,191.35 and 5,512.44

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Solution

The fourth proportional to 8,128.15, 12,191.35 and 5,512.44 is: 8,268.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.15 : 12,191.35 = 5,512.44 : x
  2. Step 2: Convert to fraction form
    8,128.15/12,191.35 = 5,512.44/x
  3. Step 3: Cross multiply
    8,128.15x = 12,191.35 × 5,512.44
  4. Step 4: Simplify right side
    8,128.15x = 67,204,102.77
  5. Step 5: Solve for x
    x = 67,204,102.77/8,128.15
  6. Step 6: Final answer
    x = 8,268.07

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Double scale
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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.