Home / 21,100.12-29,116.96-11,538.25

Finding the Fourth Proportional to 21,100.12, 29,116.96 and 11,538.25

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Solution

The fourth proportional to 21,100.12, 29,116.96 and 11,538.25 is: 15,922.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.12 : 29,116.96 = 11,538.25 : x
  2. Step 2: Convert to fraction form
    21,100.12/29,116.96 = 11,538.25/x
  3. Step 3: Cross multiply
    21,100.12x = 29,116.96 × 11,538.25
  4. Step 4: Simplify right side
    21,100.12x = 335,958,662.08
  5. Step 5: Solve for x
    x = 335,958,662.08/21,100.12
  6. Step 6: Final answer
    x = 15,922.12

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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.