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Finding the Fourth Proportional to 5,609.92, 8,428.80 and 3,636.80

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Solution

The fourth proportional to 5,609.92, 8,428.80 and 3,636.80 is: 5,464.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,609.92 : 8,428.80 = 3,636.80 : x
  2. Step 2: Convert to fraction form
    5,609.92/8,428.80 = 3,636.80/x
  3. Step 3: Cross multiply
    5,609.92x = 8,428.80 × 3,636.80
  4. Step 4: Simplify right side
    5,609.92x = 30,653,859.84
  5. Step 5: Solve for x
    x = 30,653,859.84/5,609.92
  6. Step 6: Final answer
    x = 5,464.22

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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.