Home / 11,685.32-16,129.19-8,149.67

Finding the Fourth Proportional to 11,685.32, 16,129.19 and 8,149.67

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Solution

The fourth proportional to 11,685.32, 16,129.19 and 8,149.67 is: 11,248.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,685.32 : 16,129.19 = 8,149.67 : x
  2. Step 2: Convert to fraction form
    11,685.32/16,129.19 = 8,149.67/x
  3. Step 3: Cross multiply
    11,685.32x = 16,129.19 × 8,149.67
  4. Step 4: Simplify right side
    11,685.32x = 131,447,575.87
  5. Step 5: Solve for x
    x = 131,447,575.87/11,685.32
  6. Step 6: Final answer
    x = 11,248.95

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.