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Finding the Fourth Proportional to 10,770.20, 16,149.90 and 4,920.20

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Solution

The fourth proportional to 10,770.20, 16,149.90 and 4,920.20 is: 7,377.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,770.20 : 16,149.90 = 4,920.20 : x
  2. Step 2: Convert to fraction form
    10,770.20/16,149.90 = 4,920.20/x
  3. Step 3: Cross multiply
    10,770.20x = 16,149.90 × 4,920.20
  4. Step 4: Simplify right side
    10,770.20x = 79,460,737.98
  5. Step 5: Solve for x
    x = 79,460,737.98/10,770.20
  6. Step 6: Final answer
    x = 7,377.83

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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.