Home / 5,143.30-7,097.78-2,785.45

Finding the Fourth Proportional to 5,143.30, 7,097.78 and 2,785.45

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Solution

The fourth proportional to 5,143.30, 7,097.78 and 2,785.45 is: 3,843.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,143.30 : 7,097.78 = 2,785.45 : x
  2. Step 2: Convert to fraction form
    5,143.30/7,097.78 = 2,785.45/x
  3. Step 3: Cross multiply
    5,143.30x = 7,097.78 × 2,785.45
  4. Step 4: Simplify right side
    5,143.30x = 19,770,511.30
  5. Step 5: Solve for x
    x = 19,770,511.30/5,143.30
  6. Step 6: Final answer
    x = 3,843.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.