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Finding the Fourth Proportional to 28,199.88, 38,915.84 and 16,869.86

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Solution

The fourth proportional to 28,199.88, 38,915.84 and 16,869.86 is: 23,280.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,199.88 : 38,915.84 = 16,869.86 : x
  2. Step 2: Convert to fraction form
    28,199.88/38,915.84 = 16,869.86/x
  3. Step 3: Cross multiply
    28,199.88x = 38,915.84 × 16,869.86
  4. Step 4: Simplify right side
    28,199.88x = 656,504,766.11
  5. Step 5: Solve for x
    x = 656,504,766.11/28,199.88
  6. Step 6: Final answer
    x = 23,280.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.