Home / 21,103.09-31,640.58-11,619.87

Finding the Fourth Proportional to 21,103.09, 31,640.58 and 11,619.87

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Solution

The fourth proportional to 21,103.09, 31,640.58 and 11,619.87 is: 17,422.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.09 : 31,640.58 = 11,619.87 : x
  2. Step 2: Convert to fraction form
    21,103.09/31,640.58 = 11,619.87/x
  3. Step 3: Cross multiply
    21,103.09x = 31,640.58 × 11,619.87
  4. Step 4: Simplify right side
    21,103.09x = 367,659,515.06
  5. Step 5: Solve for x
    x = 367,659,515.06/21,103.09
  6. Step 6: Final answer
    x = 17,422.07

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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.