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Finding the Fourth Proportional to 13,915.27, 20,845.07 and 8,365.56

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Solution

The fourth proportional to 13,915.27, 20,845.07 and 8,365.56 is: 12,531.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.27 : 20,845.07 = 8,365.56 : x
  2. Step 2: Convert to fraction form
    13,915.27/20,845.07 = 8,365.56/x
  3. Step 3: Cross multiply
    13,915.27x = 20,845.07 × 8,365.56
  4. Step 4: Simplify right side
    13,915.27x = 174,380,683.79
  5. Step 5: Solve for x
    x = 174,380,683.79/13,915.27
  6. Step 6: Final answer
    x = 12,531.61

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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.