Home / 13,221.33-18,238.07-8,182.35

Finding the Fourth Proportional to 13,221.33, 18,238.07 and 8,182.35

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Solution

The fourth proportional to 13,221.33, 18,238.07 and 8,182.35 is: 11,287.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.33 : 18,238.07 = 8,182.35 : x
  2. Step 2: Convert to fraction form
    13,221.33/18,238.07 = 8,182.35/x
  3. Step 3: Cross multiply
    13,221.33x = 18,238.07 × 8,182.35
  4. Step 4: Simplify right side
    13,221.33x = 149,230,231.15
  5. Step 5: Solve for x
    x = 149,230,231.15/13,221.33
  6. Step 6: Final answer
    x = 11,287.08

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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.