Home / 21,419.09-29,558.73-11,987.63

Finding the Fourth Proportional to 21,419.09, 29,558.73 and 11,987.63

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Solution

The fourth proportional to 21,419.09, 29,558.73 and 11,987.63 is: 16,543.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,419.09 : 29,558.73 = 11,987.63 : x
  2. Step 2: Convert to fraction form
    21,419.09/29,558.73 = 11,987.63/x
  3. Step 3: Cross multiply
    21,419.09x = 29,558.73 × 11,987.63
  4. Step 4: Simplify right side
    21,419.09x = 354,338,910.78
  5. Step 5: Solve for x
    x = 354,338,910.78/21,419.09
  6. Step 6: Final answer
    x = 16,543.14

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Similar ratio
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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.