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Finding the Fourth Proportional to 8,242.80, 12,353.40 and 3,308.40

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Solution

The fourth proportional to 8,242.80, 12,353.40 and 3,308.40 is: 4,958.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,242.80 : 12,353.40 = 3,308.40 : x
  2. Step 2: Convert to fraction form
    8,242.80/12,353.40 = 3,308.40/x
  3. Step 3: Cross multiply
    8,242.80x = 12,353.40 × 3,308.40
  4. Step 4: Simplify right side
    8,242.80x = 40,869,988.56
  5. Step 5: Solve for x
    x = 40,869,988.56/8,242.80
  6. Step 6: Final answer
    x = 4,958.27

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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.