Home / 21,185.40-29,231.46-11,751.96

Finding the Fourth Proportional to 21,185.40, 29,231.46 and 11,751.96

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Solution

The fourth proportional to 21,185.40, 29,231.46 and 11,751.96 is: 16,215.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.40 : 29,231.46 = 11,751.96 : x
  2. Step 2: Convert to fraction form
    21,185.40/29,231.46 = 11,751.96/x
  3. Step 3: Cross multiply
    21,185.40x = 29,231.46 × 11,751.96
  4. Step 4: Simplify right side
    21,185.40x = 343,526,948.66
  5. Step 5: Solve for x
    x = 343,526,948.66/21,185.40
  6. Step 6: Final answer
    x = 16,215.27

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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.