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Finding the Fourth Proportional to 11,893.20, 17,839.80 and 8,437.20

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Solution

The fourth proportional to 11,893.20, 17,839.80 and 8,437.20 is: 12,655.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,893.20 : 17,839.80 = 8,437.20 : x
  2. Step 2: Convert to fraction form
    11,893.20/17,839.80 = 8,437.20/x
  3. Step 3: Cross multiply
    11,893.20x = 17,839.80 × 8,437.20
  4. Step 4: Simplify right side
    11,893.20x = 150,517,960.56
  5. Step 5: Solve for x
    x = 150,517,960.56/11,893.20
  6. Step 6: Final answer
    x = 12,655.80

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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.