Home / 8,113.57-12,170.32-3,179.72

Finding the Fourth Proportional to 8,113.57, 12,170.32 and 3,179.72

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Solution

The fourth proportional to 8,113.57, 12,170.32 and 3,179.72 is: 4,769.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,113.57 : 12,170.32 = 3,179.72 : x
  2. Step 2: Convert to fraction form
    8,113.57/12,170.32 = 3,179.72/x
  3. Step 3: Cross multiply
    8,113.57x = 12,170.32 × 3,179.72
  4. Step 4: Simplify right side
    8,113.57x = 38,698,232.39
  5. Step 5: Solve for x
    x = 38,698,232.39/8,113.57
  6. Step 6: Final answer
    x = 4,769.57

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Double scale
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Similar ratio
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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.