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Finding the Fourth Proportional to 11,426.44, 15,767.86 and 6,390.86

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Solution

The fourth proportional to 11,426.44, 15,767.86 and 6,390.86 is: 8,819.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,426.44 : 15,767.86 = 6,390.86 : x
  2. Step 2: Convert to fraction form
    11,426.44/15,767.86 = 6,390.86/x
  3. Step 3: Cross multiply
    11,426.44x = 15,767.86 × 6,390.86
  4. Step 4: Simplify right side
    11,426.44x = 100,770,185.76
  5. Step 5: Solve for x
    x = 100,770,185.76/11,426.44
  6. Step 6: Final answer
    x = 8,819.04

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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.