Home / 21,201.44-31,786.80-10,805.28

Finding the Fourth Proportional to 21,201.44, 31,786.80 and 10,805.28

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Solution

The fourth proportional to 21,201.44, 31,786.80 and 10,805.28 is: 16,200.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,201.44 : 31,786.80 = 10,805.28 : x
  2. Step 2: Convert to fraction form
    21,201.44/31,786.80 = 10,805.28/x
  3. Step 3: Cross multiply
    21,201.44x = 31,786.80 × 10,805.28
  4. Step 4: Simplify right side
    21,201.44x = 343,465,274.30
  5. Step 5: Solve for x
    x = 343,465,274.30/21,201.44
  6. Step 6: Final answer
    x = 16,200.09

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1.5x scale

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.