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Finding the Fourth Proportional to 5,819.17, 8,021.12 and 3,930.15

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Solution

The fourth proportional to 5,819.17, 8,021.12 and 3,930.15 is: 5,417.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,819.17 : 8,021.12 = 3,930.15 : x
  2. Step 2: Convert to fraction form
    5,819.17/8,021.12 = 3,930.15/x
  3. Step 3: Cross multiply
    5,819.17x = 8,021.12 × 3,930.15
  4. Step 4: Simplify right side
    5,819.17x = 31,524,192.41
  5. Step 5: Solve for x
    x = 31,524,192.41/5,819.17
  6. Step 6: Final answer
    x = 5,417.30

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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.