Home / 13,199.54-18,215.81-7,231.20

Finding the Fourth Proportional to 13,199.54, 18,215.81 and 7,231.20

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Solution

The fourth proportional to 13,199.54, 18,215.81 and 7,231.20 is: 9,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,199.54 : 18,215.81 = 7,231.20 : x
  2. Step 2: Convert to fraction form
    13,199.54/18,215.81 = 7,231.20/x
  3. Step 3: Cross multiply
    13,199.54x = 18,215.81 × 7,231.20
  4. Step 4: Simplify right side
    13,199.54x = 131,722,183.35
  5. Step 5: Solve for x
    x = 131,722,183.35/13,199.54
  6. Step 6: Final answer
    x = 9,979.30

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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.