Home / 3,995.21-5,511.72-2,379.78

Finding the Fourth Proportional to 3,995.21, 5,511.72 and 2,379.78

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Solution

The fourth proportional to 3,995.21, 5,511.72 and 2,379.78 is: 3,283.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,995.21 : 5,511.72 = 2,379.78 : x
  2. Step 2: Convert to fraction form
    3,995.21/5,511.72 = 2,379.78/x
  3. Step 3: Cross multiply
    3,995.21x = 5,511.72 × 2,379.78
  4. Step 4: Simplify right side
    3,995.21x = 13,116,681.02
  5. Step 5: Solve for x
    x = 13,116,681.02/3,995.21
  6. Step 6: Final answer
    x = 3,283.11

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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.