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Finding the Fourth Proportional to 7,381.80, 11,072.70 and 4,770.60

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Solution

The fourth proportional to 7,381.80, 11,072.70 and 4,770.60 is: 7,155.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,381.80 : 11,072.70 = 4,770.60 : x
  2. Step 2: Convert to fraction form
    7,381.80/11,072.70 = 4,770.60/x
  3. Step 3: Cross multiply
    7,381.80x = 11,072.70 × 4,770.60
  4. Step 4: Simplify right side
    7,381.80x = 52,823,422.62
  5. Step 5: Solve for x
    x = 52,823,422.62/7,381.80
  6. Step 6: Final answer
    x = 7,155.90

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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.