Home / 5,078.43-7,007.78-2,840.13

Finding the Fourth Proportional to 5,078.43, 7,007.78 and 2,840.13

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Solution

The fourth proportional to 5,078.43, 7,007.78 and 2,840.13 is: 3,919.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.43 : 7,007.78 = 2,840.13 : x
  2. Step 2: Convert to fraction form
    5,078.43/7,007.78 = 2,840.13/x
  3. Step 3: Cross multiply
    5,078.43x = 7,007.78 × 2,840.13
  4. Step 4: Simplify right side
    5,078.43x = 19,903,013.31
  5. Step 5: Solve for x
    x = 19,903,013.31/5,078.43
  6. Step 6: Final answer
    x = 3,919.13

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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.