Home / 7,185.82-9,916.43-3,999.41

Finding the Fourth Proportional to 7,185.82, 9,916.43 and 3,999.41

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Solution

The fourth proportional to 7,185.82, 9,916.43 and 3,999.41 is: 5,519.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,185.82 : 9,916.43 = 3,999.41 : x
  2. Step 2: Convert to fraction form
    7,185.82/9,916.43 = 3,999.41/x
  3. Step 3: Cross multiply
    7,185.82x = 9,916.43 × 3,999.41
  4. Step 4: Simplify right side
    7,185.82x = 39,659,869.31
  5. Step 5: Solve for x
    x = 39,659,869.31/7,185.82
  6. Step 6: Final answer
    x = 5,519.18

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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.