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Finding the Fourth Proportional to 7,080.14, 10,620.21 and 1,815.18

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Solution

The fourth proportional to 7,080.14, 10,620.21 and 1,815.18 is: 2,722.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,080.14 : 10,620.21 = 1,815.18 : x
  2. Step 2: Convert to fraction form
    7,080.14/10,620.21 = 1,815.18/x
  3. Step 3: Cross multiply
    7,080.14x = 10,620.21 × 1,815.18
  4. Step 4: Simplify right side
    7,080.14x = 19,277,559.77
  5. Step 5: Solve for x
    x = 19,277,559.77/7,080.14
  6. Step 6: Final answer
    x = 2,722.76

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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.