Home / 21,244.68-31,872.44-12,486.96

Finding the Fourth Proportional to 21,244.68, 31,872.44 and 12,486.96

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Solution

The fourth proportional to 21,244.68, 31,872.44 and 12,486.96 is: 18,733.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,244.68 : 31,872.44 = 12,486.96 : x
  2. Step 2: Convert to fraction form
    21,244.68/31,872.44 = 12,486.96/x
  3. Step 3: Cross multiply
    21,244.68x = 31,872.44 × 12,486.96
  4. Step 4: Simplify right side
    21,244.68x = 397,989,883.38
  5. Step 5: Solve for x
    x = 397,989,883.38/21,244.68
  6. Step 6: Final answer
    x = 18,733.63

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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.