Home / 21,284.30-31,933.74-8,140.43

Finding the Fourth Proportional to 21,284.30, 31,933.74 and 8,140.43

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Solution

The fourth proportional to 21,284.30, 31,933.74 and 8,140.43 is: 12,213.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,284.30 : 31,933.74 = 8,140.43 : x
  2. Step 2: Convert to fraction form
    21,284.30/31,933.74 = 8,140.43/x
  3. Step 3: Cross multiply
    21,284.30x = 31,933.74 × 8,140.43
  4. Step 4: Simplify right side
    21,284.30x = 259,954,485.47
  5. Step 5: Solve for x
    x = 259,954,485.47/21,284.30
  6. Step 6: Final answer
    x = 12,213.44

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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.