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Finding the Fourth Proportional to 7,361.80, 11,042.70 and 1,815.10

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Solution

The fourth proportional to 7,361.80, 11,042.70 and 1,815.10 is: 2,722.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,361.80 : 11,042.70 = 1,815.10 : x
  2. Step 2: Convert to fraction form
    7,361.80/11,042.70 = 1,815.10/x
  3. Step 3: Cross multiply
    7,361.80x = 11,042.70 × 1,815.10
  4. Step 4: Simplify right side
    7,361.80x = 20,043,604.77
  5. Step 5: Solve for x
    x = 20,043,604.77/7,361.80
  6. Step 6: Final answer
    x = 2,722.65

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Similar ratio
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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.