Home / 8,112.39-12,169.82-3,432.40

Finding the Fourth Proportional to 8,112.39, 12,169.82 and 3,432.40

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Solution

The fourth proportional to 8,112.39, 12,169.82 and 3,432.40 is: 5,149.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.39 : 12,169.82 = 3,432.40 : x
  2. Step 2: Convert to fraction form
    8,112.39/12,169.82 = 3,432.40/x
  3. Step 3: Cross multiply
    8,112.39x = 12,169.82 × 3,432.40
  4. Step 4: Simplify right side
    8,112.39x = 41,771,690.17
  5. Step 5: Solve for x
    x = 41,771,690.17/8,112.39
  6. Step 6: Final answer
    x = 5,149.12

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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.