Home / 13,185.31-18,195.90-7,216.85

Finding the Fourth Proportional to 13,185.31, 18,195.90 and 7,216.85

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Solution

The fourth proportional to 13,185.31, 18,195.90 and 7,216.85 is: 9,959.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,185.31 : 18,195.90 = 7,216.85 : x
  2. Step 2: Convert to fraction form
    13,185.31/18,195.90 = 7,216.85/x
  3. Step 3: Cross multiply
    13,185.31x = 18,195.90 × 7,216.85
  4. Step 4: Simplify right side
    13,185.31x = 131,317,121.23
  5. Step 5: Solve for x
    x = 131,317,121.23/13,185.31
  6. Step 6: Final answer
    x = 9,959.35

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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.