Home / 21,172.78-31,767.36-15,672.52

Finding the Fourth Proportional to 21,172.78, 31,767.36 and 15,672.52

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Solution

The fourth proportional to 21,172.78, 31,767.36 and 15,672.52 is: 23,514.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.78 : 31,767.36 = 15,672.52 : x
  2. Step 2: Convert to fraction form
    21,172.78/31,767.36 = 15,672.52/x
  3. Step 3: Cross multiply
    21,172.78x = 31,767.36 × 15,672.52
  4. Step 4: Simplify right side
    21,172.78x = 497,874,584.95
  5. Step 5: Solve for x
    x = 497,874,584.95/21,172.78
  6. Step 6: Final answer
    x = 23,514.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.