Home / 20,649.78-28,496.61-11,218.41

Finding the Fourth Proportional to 20,649.78, 28,496.61 and 11,218.41

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Solution

The fourth proportional to 20,649.78, 28,496.61 and 11,218.41 is: 15,481.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649.78 : 28,496.61 = 11,218.41 : x
  2. Step 2: Convert to fraction form
    20,649.78/28,496.61 = 11,218.41/x
  3. Step 3: Cross multiply
    20,649.78x = 28,496.61 × 11,218.41
  4. Step 4: Simplify right side
    20,649.78x = 319,686,654.59
  5. Step 5: Solve for x
    x = 319,686,654.59/20,649.78
  6. Step 6: Final answer
    x = 15,481.36

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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.