Home / 13,185.38-18,195.63-7,216.90

Finding the Fourth Proportional to 13,185.38, 18,195.63 and 7,216.90

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Solution

The fourth proportional to 13,185.38, 18,195.63 and 7,216.90 is: 9,959.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,185.38 : 18,195.63 = 7,216.90 : x
  2. Step 2: Convert to fraction form
    13,185.38/18,195.63 = 7,216.90/x
  3. Step 3: Cross multiply
    13,185.38x = 18,195.63 × 7,216.90
  4. Step 4: Simplify right side
    13,185.38x = 131,316,042.15
  5. Step 5: Solve for x
    x = 131,316,042.15/13,185.38
  6. Step 6: Final answer
    x = 9,959.22

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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.