Home / 21,419.32-29,557.02-11,986.60

Finding the Fourth Proportional to 21,419.32, 29,557.02 and 11,986.60

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Solution

The fourth proportional to 21,419.32, 29,557.02 and 11,986.60 is: 16,540.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,419.32 : 29,557.02 = 11,986.60 : x
  2. Step 2: Convert to fraction form
    21,419.32/29,557.02 = 11,986.60/x
  3. Step 3: Cross multiply
    21,419.32x = 29,557.02 × 11,986.60
  4. Step 4: Simplify right side
    21,419.32x = 354,288,175.93
  5. Step 5: Solve for x
    x = 354,288,175.93/21,419.32
  6. Step 6: Final answer
    x = 16,540.59

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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.