Home / 21,672.44-29,910.06-13,172.69

Finding the Fourth Proportional to 21,672.44, 29,910.06 and 13,172.69

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Solution

The fourth proportional to 21,672.44, 29,910.06 and 13,172.69 is: 18,179.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,672.44 : 29,910.06 = 13,172.69 : x
  2. Step 2: Convert to fraction form
    21,672.44/29,910.06 = 13,172.69/x
  3. Step 3: Cross multiply
    21,672.44x = 29,910.06 × 13,172.69
  4. Step 4: Simplify right side
    21,672.44x = 393,995,948.26
  5. Step 5: Solve for x
    x = 393,995,948.26/21,672.44
  6. Step 6: Final answer
    x = 18,179.58

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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.