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Finding the Fourth Proportional to 5,819.79, 8,042.72 and 5,171.79

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Solution

The fourth proportional to 5,819.79, 8,042.72 and 5,171.79 is: 7,147.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,819.79 : 8,042.72 = 5,171.79 : x
  2. Step 2: Convert to fraction form
    5,819.79/8,042.72 = 5,171.79/x
  3. Step 3: Cross multiply
    5,819.79x = 8,042.72 × 5,171.79
  4. Step 4: Simplify right side
    5,819.79x = 41,595,233.01
  5. Step 5: Solve for x
    x = 41,595,233.01/5,819.79
  6. Step 6: Final answer
    x = 7,147.21

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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.