Home / 21,329.88-31,981.12-8,858.52

Finding the Fourth Proportional to 21,329.88, 31,981.12 and 8,858.52

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Solution

The fourth proportional to 21,329.88, 31,981.12 and 8,858.52 is: 13,282.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.88 : 31,981.12 = 8,858.52 : x
  2. Step 2: Convert to fraction form
    21,329.88/31,981.12 = 8,858.52/x
  3. Step 3: Cross multiply
    21,329.88x = 31,981.12 × 8,858.52
  4. Step 4: Simplify right side
    21,329.88x = 283,305,391.14
  5. Step 5: Solve for x
    x = 283,305,391.14/21,329.88
  6. Step 6: Final answer
    x = 13,282.09

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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.