Home / 3,678.39-5,077.81-2,186.79

Finding the Fourth Proportional to 3,678.39, 5,077.81 and 2,186.79

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Solution

The fourth proportional to 3,678.39, 5,077.81 and 2,186.79 is: 3,018.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.39 : 5,077.81 = 2,186.79 : x
  2. Step 2: Convert to fraction form
    3,678.39/5,077.81 = 2,186.79/x
  3. Step 3: Cross multiply
    3,678.39x = 5,077.81 × 2,186.79
  4. Step 4: Simplify right side
    3,678.39x = 11,104,104.13
  5. Step 5: Solve for x
    x = 11,104,104.13/3,678.39
  6. Step 6: Final answer
    x = 3,018.74

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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.