Home / 21,282.24-31,912.43-11,429.81

Finding the Fourth Proportional to 21,282.24, 31,912.43 and 11,429.81

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Solution

The fourth proportional to 21,282.24, 31,912.43 and 11,429.81 is: 17,138.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,282.24 : 31,912.43 = 11,429.81 : x
  2. Step 2: Convert to fraction form
    21,282.24/31,912.43 = 11,429.81/x
  3. Step 3: Cross multiply
    21,282.24x = 31,912.43 × 11,429.81
  4. Step 4: Simplify right side
    21,282.24x = 364,752,978.79
  5. Step 5: Solve for x
    x = 364,752,978.79/21,282.24
  6. Step 6: Final answer
    x = 17,138.84

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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.