Home / 3,135.20-4,696.40-1,815.10

Finding the Fourth Proportional to 3,135.20, 4,696.40 and 1,815.10

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Solution

The fourth proportional to 3,135.20, 4,696.40 and 1,815.10 is: 2,718.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,135.20 : 4,696.40 = 1,815.10 : x
  2. Step 2: Convert to fraction form
    3,135.20/4,696.40 = 1,815.10/x
  3. Step 3: Cross multiply
    3,135.20x = 4,696.40 × 1,815.10
  4. Step 4: Simplify right side
    3,135.20x = 8,524,435.64
  5. Step 5: Solve for x
    x = 8,524,435.64/3,135.20
  6. Step 6: Final answer
    x = 2,718.94

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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.