Home / 3,678.89-5,078.51-2,187.29

Finding the Fourth Proportional to 3,678.89, 5,078.51 and 2,187.29

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Solution

The fourth proportional to 3,678.89, 5,078.51 and 2,187.29 is: 3,019.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.89 : 5,078.51 = 2,187.29 : x
  2. Step 2: Convert to fraction form
    3,678.89/5,078.51 = 2,187.29/x
  3. Step 3: Cross multiply
    3,678.89x = 5,078.51 × 2,187.29
  4. Step 4: Simplify right side
    3,678.89x = 11,108,137.81
  5. Step 5: Solve for x
    x = 11,108,137.81/3,678.89
  6. Step 6: Final answer
    x = 3,019.43

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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.