Home / 21,185.07-31,786.58-10,649.54

Finding the Fourth Proportional to 21,185.07, 31,786.58 and 10,649.54

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Solution

The fourth proportional to 21,185.07, 31,786.58 and 10,649.54 is: 15,978.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.07 : 31,786.58 = 10,649.54 : x
  2. Step 2: Convert to fraction form
    21,185.07/31,786.58 = 10,649.54/x
  3. Step 3: Cross multiply
    21,185.07x = 31,786.58 × 10,649.54
  4. Step 4: Simplify right side
    21,185.07x = 338,512,455.17
  5. Step 5: Solve for x
    x = 338,512,455.17/21,185.07
  6. Step 6: Final answer
    x = 15,978.82

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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.