Home / 21,208.20-31,801.41-11,218.34

Finding the Fourth Proportional to 21,208.20, 31,801.41 and 11,218.34

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Solution

The fourth proportional to 21,208.20, 31,801.41 and 11,218.34 is: 16,821.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,208.20 : 31,801.41 = 11,218.34 : x
  2. Step 2: Convert to fraction form
    21,208.20/31,801.41 = 11,218.34/x
  3. Step 3: Cross multiply
    21,208.20x = 31,801.41 × 11,218.34
  4. Step 4: Simplify right side
    21,208.20x = 356,758,912.92
  5. Step 5: Solve for x
    x = 356,758,912.92/21,208.20
  6. Step 6: Final answer
    x = 16,821.75

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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.