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Finding the Fourth Proportional to 13,591.29, 20,354.01 and 6,910.21

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Solution

The fourth proportional to 13,591.29, 20,354.01 and 6,910.21 is: 10,348.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,591.29 : 20,354.01 = 6,910.21 : x
  2. Step 2: Convert to fraction form
    13,591.29/20,354.01 = 6,910.21/x
  3. Step 3: Cross multiply
    13,591.29x = 20,354.01 × 6,910.21
  4. Step 4: Simplify right side
    13,591.29x = 140,650,483.44
  5. Step 5: Solve for x
    x = 140,650,483.44/13,591.29
  6. Step 6: Final answer
    x = 10,348.57

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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.