Home / 21,511.25-29,672.66-13,539.64

Finding the Fourth Proportional to 21,511.25, 29,672.66 and 13,539.64

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Solution

The fourth proportional to 21,511.25, 29,672.66 and 13,539.64 is: 18,676.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.25 : 29,672.66 = 13,539.64 : x
  2. Step 2: Convert to fraction form
    21,511.25/29,672.66 = 13,539.64/x
  3. Step 3: Cross multiply
    21,511.25x = 29,672.66 × 13,539.64
  4. Step 4: Simplify right side
    21,511.25x = 401,756,918.18
  5. Step 5: Solve for x
    x = 401,756,918.18/21,511.25
  6. Step 6: Final answer
    x = 18,676.60

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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.