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Finding the Fourth Proportional to 11,382.56, 17,056.56 and 8,447.12

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Solution

The fourth proportional to 11,382.56, 17,056.56 and 8,447.12 is: 12,657.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,382.56 : 17,056.56 = 8,447.12 : x
  2. Step 2: Convert to fraction form
    11,382.56/17,056.56 = 8,447.12/x
  3. Step 3: Cross multiply
    11,382.56x = 17,056.56 × 8,447.12
  4. Step 4: Simplify right side
    11,382.56x = 144,078,809.11
  5. Step 5: Solve for x
    x = 144,078,809.11/11,382.56
  6. Step 6: Final answer
    x = 12,657.86

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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.