Home / 21,338.88-29,440.77-11,905.62

Finding the Fourth Proportional to 21,338.88, 29,440.77 and 11,905.62

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Solution

The fourth proportional to 21,338.88, 29,440.77 and 11,905.62 is: 16,425.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.88 : 29,440.77 = 11,905.62 : x
  2. Step 2: Convert to fraction form
    21,338.88/29,440.77 = 11,905.62/x
  3. Step 3: Cross multiply
    21,338.88x = 29,440.77 × 11,905.62
  4. Step 4: Simplify right side
    21,338.88x = 350,510,620.13
  5. Step 5: Solve for x
    x = 350,510,620.13/21,338.88
  6. Step 6: Final answer
    x = 16,425.91

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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.