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Finding the Fourth Proportional to 12,469.80, 18,682.02 and 7,259.88

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Solution

The fourth proportional to 12,469.80, 18,682.02 and 7,259.88 is: 10,876.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,469.80 : 18,682.02 = 7,259.88 : x
  2. Step 2: Convert to fraction form
    12,469.80/18,682.02 = 7,259.88/x
  3. Step 3: Cross multiply
    12,469.80x = 18,682.02 × 7,259.88
  4. Step 4: Simplify right side
    12,469.80x = 135,629,223.36
  5. Step 5: Solve for x
    x = 135,629,223.36/12,469.80
  6. Step 6: Final answer
    x = 10,876.62

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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.