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Finding the Fourth Proportional to 5,390.92, 8,105.82 and 4,418.92

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Solution

The fourth proportional to 5,390.92, 8,105.82 and 4,418.92 is: 6,644.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.92 : 8,105.82 = 4,418.92 : x
  2. Step 2: Convert to fraction form
    5,390.92/8,105.82 = 4,418.92/x
  3. Step 3: Cross multiply
    5,390.92x = 8,105.82 × 4,418.92
  4. Step 4: Simplify right side
    5,390.92x = 35,818,970.11
  5. Step 5: Solve for x
    x = 35,818,970.11/5,390.92
  6. Step 6: Final answer
    x = 6,644.31

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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.