Home / 4,115.19-5,678.55-2,789.40

Finding the Fourth Proportional to 4,115.19, 5,678.55 and 2,789.40

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Solution

The fourth proportional to 4,115.19, 5,678.55 and 2,789.40 is: 3,849.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,115.19 : 5,678.55 = 2,789.40 : x
  2. Step 2: Convert to fraction form
    4,115.19/5,678.55 = 2,789.40/x
  3. Step 3: Cross multiply
    4,115.19x = 5,678.55 × 2,789.40
  4. Step 4: Simplify right side
    4,115.19x = 15,839,747.37
  5. Step 5: Solve for x
    x = 15,839,747.37/4,115.19
  6. Step 6: Final answer
    x = 3,849.09

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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.