Home / 13,199.33-18,215.08-7,231.22

Finding the Fourth Proportional to 13,199.33, 18,215.08 and 7,231.22

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Solution

The fourth proportional to 13,199.33, 18,215.08 and 7,231.22 is: 9,979.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,199.33 : 18,215.08 = 7,231.22 : x
  2. Step 2: Convert to fraction form
    13,199.33/18,215.08 = 7,231.22/x
  3. Step 3: Cross multiply
    13,199.33x = 18,215.08 × 7,231.22
  4. Step 4: Simplify right side
    13,199.33x = 131,717,250.80
  5. Step 5: Solve for x
    x = 131,717,250.80/13,199.33
  6. Step 6: Final answer
    x = 9,979.09

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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.