Home / 4,914.78-6,781.37-3,122.79

Finding the Fourth Proportional to 4,914.78, 6,781.37 and 3,122.79

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Solution

The fourth proportional to 4,914.78, 6,781.37 and 3,122.79 is: 4,308.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,914.78 : 6,781.37 = 3,122.79 : x
  2. Step 2: Convert to fraction form
    4,914.78/6,781.37 = 3,122.79/x
  3. Step 3: Cross multiply
    4,914.78x = 6,781.37 × 3,122.79
  4. Step 4: Simplify right side
    4,914.78x = 21,176,778.81
  5. Step 5: Solve for x
    x = 21,176,778.81/4,914.78
  6. Step 6: Final answer
    x = 4,308.79

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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.