Home / 3,935.81-5,907.38-1,989.38

Finding the Fourth Proportional to 3,935.81, 5,907.38 and 1,989.38

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Solution

The fourth proportional to 3,935.81, 5,907.38 and 1,989.38 is: 2,985.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.81 : 5,907.38 = 1,989.38 : x
  2. Step 2: Convert to fraction form
    3,935.81/5,907.38 = 1,989.38/x
  3. Step 3: Cross multiply
    3,935.81x = 5,907.38 × 1,989.38
  4. Step 4: Simplify right side
    3,935.81x = 11,752,013.68
  5. Step 5: Solve for x
    x = 11,752,013.68/3,935.81
  6. Step 6: Final answer
    x = 2,985.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.