Home / 21,087.88-31,623.10-8,599.43

Finding the Fourth Proportional to 21,087.88, 31,623.10 and 8,599.43

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Solution

The fourth proportional to 21,087.88, 31,623.10 and 8,599.43 is: 12,895.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.88 : 31,623.10 = 8,599.43 : x
  2. Step 2: Convert to fraction form
    21,087.88/31,623.10 = 8,599.43/x
  3. Step 3: Cross multiply
    21,087.88x = 31,623.10 × 8,599.43
  4. Step 4: Simplify right side
    21,087.88x = 271,940,634.83
  5. Step 5: Solve for x
    x = 271,940,634.83/21,087.88
  6. Step 6: Final answer
    x = 12,895.59

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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.