Home / 4,115.12-5,678.60-2,786.72

Finding the Fourth Proportional to 4,115.12, 5,678.60 and 2,786.72

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Solution

The fourth proportional to 4,115.12, 5,678.60 and 2,786.72 is: 3,845.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,115.12 : 5,678.60 = 2,786.72 : x
  2. Step 2: Convert to fraction form
    4,115.12/5,678.60 = 2,786.72/x
  3. Step 3: Cross multiply
    4,115.12x = 5,678.60 × 2,786.72
  4. Step 4: Simplify right side
    4,115.12x = 15,824,668.19
  5. Step 5: Solve for x
    x = 15,824,668.19/4,115.12
  6. Step 6: Final answer
    x = 3,845.49

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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.