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Finding the Fourth Proportional to 8,505.40, 12,757.20 and 2,661.70

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Solution

The fourth proportional to 8,505.40, 12,757.20 and 2,661.70 is: 3,992.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505.40 : 12,757.20 = 2,661.70 : x
  2. Step 2: Convert to fraction form
    8,505.40/12,757.20 = 2,661.70/x
  3. Step 3: Cross multiply
    8,505.40x = 12,757.20 × 2,661.70
  4. Step 4: Simplify right side
    8,505.40x = 33,955,839.24
  5. Step 5: Solve for x
    x = 33,955,839.24/8,505.40
  6. Step 6: Final answer
    x = 3,992.27

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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.