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Finding the Fourth Proportional to 11,124.64, 16,685.60 and 2,917.28

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Solution

The fourth proportional to 11,124.64, 16,685.60 and 2,917.28 is: 4,375.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,124.64 : 16,685.60 = 2,917.28 : x
  2. Step 2: Convert to fraction form
    11,124.64/16,685.60 = 2,917.28/x
  3. Step 3: Cross multiply
    11,124.64x = 16,685.60 × 2,917.28
  4. Step 4: Simplify right side
    11,124.64x = 48,676,567.17
  5. Step 5: Solve for x
    x = 48,676,567.17/11,124.64
  6. Step 6: Final answer
    x = 4,375.56

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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.