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Finding the Fourth Proportional to 6,220.98, 8,580.92 and 3,979.31

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Solution

The fourth proportional to 6,220.98, 8,580.92 and 3,979.31 is: 5,488.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,220.98 : 8,580.92 = 3,979.31 : x
  2. Step 2: Convert to fraction form
    6,220.98/8,580.92 = 3,979.31/x
  3. Step 3: Cross multiply
    6,220.98x = 8,580.92 × 3,979.31
  4. Step 4: Simplify right side
    6,220.98x = 34,146,077.96
  5. Step 5: Solve for x
    x = 34,146,077.96/6,220.98
  6. Step 6: Final answer
    x = 5,488.86

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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.