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Finding the Fourth Proportional to 5,638.87, 8,456.22 and 1,940.08

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Solution

The fourth proportional to 5,638.87, 8,456.22 and 1,940.08 is: 2,909.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.87 : 8,456.22 = 1,940.08 : x
  2. Step 2: Convert to fraction form
    5,638.87/8,456.22 = 1,940.08/x
  3. Step 3: Cross multiply
    5,638.87x = 8,456.22 × 1,940.08
  4. Step 4: Simplify right side
    5,638.87x = 16,405,743.30
  5. Step 5: Solve for x
    x = 16,405,743.30/5,638.87
  6. Step 6: Final answer
    x = 2,909.40

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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.