Home / 13,211.25-18,231.53-7,622.25

Finding the Fourth Proportional to 13,211.25, 18,231.53 and 7,622.25

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Solution

The fourth proportional to 13,211.25, 18,231.53 and 7,622.25 is: 10,518.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.25 : 18,231.53 = 7,622.25 : x
  2. Step 2: Convert to fraction form
    13,211.25/18,231.53 = 7,622.25/x
  3. Step 3: Cross multiply
    13,211.25x = 18,231.53 × 7,622.25
  4. Step 4: Simplify right side
    13,211.25x = 138,965,241.43
  5. Step 5: Solve for x
    x = 138,965,241.43/13,211.25
  6. Step 6: Final answer
    x = 10,518.71

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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.