Home / 21,213.60-31,833.80-11,859.76

Finding the Fourth Proportional to 21,213.60, 31,833.80 and 11,859.76

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Solution

The fourth proportional to 21,213.60, 31,833.80 and 11,859.76 is: 17,797.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.60 : 31,833.80 = 11,859.76 : x
  2. Step 2: Convert to fraction form
    21,213.60/31,833.80 = 11,859.76/x
  3. Step 3: Cross multiply
    21,213.60x = 31,833.80 × 11,859.76
  4. Step 4: Simplify right side
    21,213.60x = 377,541,107.15
  5. Step 5: Solve for x
    x = 377,541,107.15/21,213.60
  6. Step 6: Final answer
    x = 17,797.12

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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.