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Finding the Fourth Proportional to 11,765.43, 17,648.15 and 3,979.71

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Solution

The fourth proportional to 11,765.43, 17,648.15 and 3,979.71 is: 5,969.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,765.43 : 17,648.15 = 3,979.71 : x
  2. Step 2: Convert to fraction form
    11,765.43/17,648.15 = 3,979.71/x
  3. Step 3: Cross multiply
    11,765.43x = 17,648.15 × 3,979.71
  4. Step 4: Simplify right side
    11,765.43x = 70,234,499.14
  5. Step 5: Solve for x
    x = 70,234,499.14/11,765.43
  6. Step 6: Final answer
    x = 5,969.57

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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.