Home / 13,199.87-18,215.82-7,231.55

Finding the Fourth Proportional to 13,199.87, 18,215.82 and 7,231.55

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Solution

The fourth proportional to 13,199.87, 18,215.82 and 7,231.55 is: 9,979.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,199.87 : 18,215.82 = 7,231.55 : x
  2. Step 2: Convert to fraction form
    13,199.87/18,215.82 = 7,231.55/x
  3. Step 3: Cross multiply
    13,199.87x = 18,215.82 × 7,231.55
  4. Step 4: Simplify right side
    13,199.87x = 131,728,522.04
  5. Step 5: Solve for x
    x = 131,728,522.04/13,199.87
  6. Step 6: Final answer
    x = 9,979.54

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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.