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Finding the Fourth Proportional to 8,422.80, 12,609.24 and 6,241.32

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Solution

The fourth proportional to 8,422.80, 12,609.24 and 6,241.32 is: 9,343.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,422.80 : 12,609.24 = 6,241.32 : x
  2. Step 2: Convert to fraction form
    8,422.80/12,609.24 = 6,241.32/x
  3. Step 3: Cross multiply
    8,422.80x = 12,609.24 × 6,241.32
  4. Step 4: Simplify right side
    8,422.80x = 78,698,301.80
  5. Step 5: Solve for x
    x = 78,698,301.80/8,422.80
  6. Step 6: Final answer
    x = 9,343.48

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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.