Home / 21,272.82-29,365.57-15,144.47

Finding the Fourth Proportional to 21,272.82, 29,365.57 and 15,144.47

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Solution

The fourth proportional to 21,272.82, 29,365.57 and 15,144.47 is: 20,905.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.82 : 29,365.57 = 15,144.47 : x
  2. Step 2: Convert to fraction form
    21,272.82/29,365.57 = 15,144.47/x
  3. Step 3: Cross multiply
    21,272.82x = 29,365.57 × 15,144.47
  4. Step 4: Simplify right side
    21,272.82x = 444,725,918.18
  5. Step 5: Solve for x
    x = 444,725,918.18/21,272.82
  6. Step 6: Final answer
    x = 20,905.83

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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.