Home / 3,890.16-5,371.92-3,618

Finding the Fourth Proportional to 3,890.16, 5,371.92 and 3,618

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Solution

The fourth proportional to 3,890.16, 5,371.92 and 3,618 is: 4,996.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.16 : 5,371.92 = 3,618 : x
  2. Step 2: Convert to fraction form
    3,890.16/5,371.92 = 3,618/x
  3. Step 3: Cross multiply
    3,890.16x = 5,371.92 × 3,618
  4. Step 4: Simplify right side
    3,890.16x = 19,435,606.56
  5. Step 5: Solve for x
    x = 19,435,606.56/3,890.16
  6. Step 6: Final answer
    x = 4,996.09

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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.