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Finding the Fourth Proportional to 9,939.40, 14,906.80 and 2,917.53

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Solution

The fourth proportional to 9,939.40, 14,906.80 and 2,917.53 is: 4,375.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,939.40 : 14,906.80 = 2,917.53 : x
  2. Step 2: Convert to fraction form
    9,939.40/14,906.80 = 2,917.53/x
  3. Step 3: Cross multiply
    9,939.40x = 14,906.80 × 2,917.53
  4. Step 4: Simplify right side
    9,939.40x = 43,491,056.86
  5. Step 5: Solve for x
    x = 43,491,056.86/9,939.40
  6. Step 6: Final answer
    x = 4,375.62

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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.