Home / 15,351.12-21,185.75-8,636.33

Finding the Fourth Proportional to 15,351.12, 21,185.75 and 8,636.33

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Solution

The fourth proportional to 15,351.12, 21,185.75 and 8,636.33 is: 11,918.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,351.12 : 21,185.75 = 8,636.33 : x
  2. Step 2: Convert to fraction form
    15,351.12/21,185.75 = 8,636.33/x
  3. Step 3: Cross multiply
    15,351.12x = 21,185.75 × 8,636.33
  4. Step 4: Simplify right side
    15,351.12x = 182,967,202.85
  5. Step 5: Solve for x
    x = 182,967,202.85/15,351.12
  6. Step 6: Final answer
    x = 11,918.82

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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.