Home / 21,224.50-31,836.75-11,991.22

Finding the Fourth Proportional to 21,224.50, 31,836.75 and 11,991.22

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Solution

The fourth proportional to 21,224.50, 31,836.75 and 11,991.22 is: 17,986.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,224.50 : 31,836.75 = 11,991.22 : x
  2. Step 2: Convert to fraction form
    21,224.50/31,836.75 = 11,991.22/x
  3. Step 3: Cross multiply
    21,224.50x = 31,836.75 × 11,991.22
  4. Step 4: Simplify right side
    21,224.50x = 381,761,473.34
  5. Step 5: Solve for x
    x = 381,761,473.34/21,224.50
  6. Step 6: Final answer
    x = 17,986.83

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.