Home / 6,109.90-8,431.80-3,456.78

Finding the Fourth Proportional to 6,109.90, 8,431.80 and 3,456.78

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Solution

The fourth proportional to 6,109.90, 8,431.80 and 3,456.78 is: 4,770.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,109.90 : 8,431.80 = 3,456.78 : x
  2. Step 2: Convert to fraction form
    6,109.90/8,431.80 = 3,456.78/x
  3. Step 3: Cross multiply
    6,109.90x = 8,431.80 × 3,456.78
  4. Step 4: Simplify right side
    6,109.90x = 29,146,833.02
  5. Step 5: Solve for x
    x = 29,146,833.02/6,109.90
  6. Step 6: Final answer
    x = 4,770.43

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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.