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Finding the Fourth Proportional to 13,951.67, 20,930.43 and 4,090.15

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Solution

The fourth proportional to 13,951.67, 20,930.43 and 4,090.15 is: 6,136.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,951.67 : 20,930.43 = 4,090.15 : x
  2. Step 2: Convert to fraction form
    13,951.67/20,930.43 = 4,090.15/x
  3. Step 3: Cross multiply
    13,951.67x = 20,930.43 × 4,090.15
  4. Step 4: Simplify right side
    13,951.67x = 85,608,493.61
  5. Step 5: Solve for x
    x = 85,608,493.61/13,951.67
  6. Step 6: Final answer
    x = 6,136.08

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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.